Percentage of questions attempt by Desmond's in his math's exam is given by :
a) In his first attempt percentage of question answered by Desmond is 67.74%.
b) In his second attempt percentage of question answered by Desmond is 93.55%.
c) Improvement in the percentage of question answered by Desmond is 25.81%.
As given in the question,
Total number of questions attempted by Desmond = 31
Number of questions fully right in first attempt of Desmond = 21
a ) Correct percentage of questions in the first attempt
= ( 21 / 31 ) × 100
= 67.74%
b) Number of questions fully right in second attempt of Desmond = 29
Correct percentage of questions in the second attempt
= ( 29 / 31 ) × 100
= 93.55%
c ) Improvement in the percentage comparing both the attempts
= ( 93.55 - 67.74 ) %
= 25.81%
Therefore, the percentage of questions attempt by Desmond is given as follow :
a) In his first attempt percentage of question answered by Desmond is 67.74%.
b) In his second attempt percentage of question answered by Desmond is 93.55%.
c) Improvement in the percentage of question answered by Desmond is 25.81%.
The above question is incomplete , the complete question is :
Desmond's GCSE math's exam is next week. As part of his revision he attempted 31 questions on his least favorite topic of percentages. He got 21 questions fully right on the first attempt. Two days later he tried all 31 questions again and this time got 29 correct.
a) What percentage of question did he get correct on his first attempt?
b) What percentage of question did he get correct on his second attempt?
c) What is the percentage improvement in Desmond's results?
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Question 4 (4 points)
For the function, find f(x) = x+9 find (fo f-¹) (5) show work.
The value of (f ₀ f⁻¹) (5) of the function f(x) = x + 9 is 5.
Given is a function f(x) = x + 9,
Setting x + 9 = y and making x the subject we have
y = x + 9
x = y - 9
replacing x with f⁻¹(x) and y with x we have
f⁻¹(x) = x - 9
so, the (f ₀ f⁻¹) (x) can be gotten by substituting x in f(x) with x - 9 so that we have,
(f ₀ f⁻¹) (x) = (x - 9) + 9
(f ₀ f⁻¹) (x) = x
Therefore,
(f ₀ f⁻¹) (5) = 5
Hence the value of (f ₀ f⁻¹) (5) of the function f(x) = x + 9 is 5.
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the number of rows needed for the truth table of the compound proposition (p→r)∨(¬s→¬t)∨(¬u→v)a. 54b. 64c. 34
The given compound proposition has three sub-propositions connected by logical OR. To construct a truth table, we need to consider all possible combinations of the variables p, q, r, s, t, u, and v. For each combination, we evaluate the truth value of each sub-proposition and then apply logical OR to obtain the final truth value of the compound proposition. Since we have seven variables, each with two possible truth values (true or false), the total number of rows needed in the truth table is 2^7 = 128.
The given compound proposition is (p→r)∨(¬s→¬t)∨(¬u→v). It has three sub-propositions connected by logical OR. To construct a truth table, we need to consider all possible combinations of the variables p, q, r, s, t, u, and v. Since each variable has two possible truth values (true or false), we have 2^7 = 128 possible combinations. For each combination, we evaluate the truth value of each sub-proposition and then apply logical OR to obtain the final truth value of the compound proposition.
To construct a truth table for the given compound proposition, we need 128 rows since we have seven variables, each with two possible truth values. Therefore, the correct answer is (b) 64 is not correct and (c) 34 is too small.
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collar c is free to slide along a smooth shaft that is fixed at a 45 angle. to the wall by a pin support at A and member CB is pinned at B and C. If collar C has a velocity of vc3 m/s directed up and to the right at the position shown below determine, Member AB is fixed securely a. The velocity of point B B) using the method of instantaneous centers b. The angular velocity of link AB AB using the method of instantaneous centers 350 mm 450 500 mm 60°
The point of intersection between the circle of centers and the line of motion is the instantaneous center of rotation.
Here is the diagram of the given problem:
A
o
|
|
|
| B
o-------o
/ C
/
/
Here is the diagram of the given problem:
Copy code
A
o
|
|
|
| B
o-------o
/ C
/
/
We will first find the velocity of point B using the method of instantaneous centers:
Draw a perpendicular line from point A to the direction of motion of point C. Let's call the intersection point D.
Draw a line from point B to point D. This line represents the velocity of point B.
Draw a line from point C to point D. This line represents the velocity of point C.
The velocity of point B is perpendicular to the line from B to D, so we can draw a perpendicular line from point D to the shaft. Let's call the intersection point E.
Draw a circle centered at point E that passes through point A. This is the circle of centers.
Draw a line from point A to point C. This is the line of motion.
The point of intersection between the circle of centers and the line of motion is the instantaneous center of rotation. Let's call this point F.
Draw a line from point F to point B. This line represents the velocity of point B.
Measure the length of the line from F to B. This is the velocity of point B.
Applying this method, we get the following diagram:
F
o
/ |
/ |
350 / | 450
/ |
/ |
/ | C
o-------o
A |
|
|
|
|
o B
500
Draw a perpendicular line from A to the line of motion of point C. Let's call the intersection point D.
Draw a line from B to D. This line represents the velocity of point B.
Draw a line from C to D. This line represents the velocity of point C.
Draw a perpendicular line from D to the shaft. Let's call the intersection point E.
Draw a circle centered at E that passes through A. This is the circle of centers.
Draw a line from A to C. This is the line of motion.
The point of intersection between the circle of centers and the line of motion is the instantaneous center of rotation. Let's call this point F.
Draw a line from F to B. This line represents the velocity of point B.
Measure the length of the line from F to B. This is the velocity of point B.
In this case, the velocity of point B is given by the distance from F to B. From the diagram, we can see that this distance is approximately 64.5 mm directed at an angle of approximately 53.1 degrees from the horizontal.
Next, we will find the angular velocity of link AB using the method of instantaneous centers:
Draw a perpendicular line from A to the line of motion of point C. Let's call the intersection point D.
Draw a line from B to D. This line represents the velocity of point B.
Draw a line from C to D. This line represents the velocity of point C.
Draw a perpendicular line from D to the shaft. Let's call the intersection point E.
Draw a circle centered at E that passes through A. This is the circle of centers.
Draw a line from A to C. This is the line of motion.
Let's call this point F.
Draw
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d. Based on the December 31, Year 2, balance sheet, what is the largest cash dividend Dakota could pay
Based on the Year 2 balance sheet, the largest cash dividend that Dakota could pay is $16,500.
What is the largest cash dividend Dakota could pay?Cash dividends refers to the payments that companies make to their shareholders which is usually on the strength of earnings. They often represent opportunity for companies to share the benefit of business profits.
Based on the balance sheet, the largest cash dividend that Dakota could pay in Year 2 is:
= $ 31,500 + $ 5,000 - $ 20,000
= $ 16,500.
Missing questions:Dakota Company experienced the following events during Year 2:
Acquired $20,000 cash from the issue of common stock.
Paid $20,000 cash to purchase land.
Borrowed $2,500 cash.
Provided services for $40,000 cash.
Paid $1,000 cash for utilities expense.
Paid $20,000 cash for other operating expenses.
Paid a $5,000 cash dividend to the stockholders.
Determined that the market value of the land purchased in Event 2 is now $25,000.
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Suppose a 3 x 3 matrix A has only two distinct eigenvalues. Suppose that tr(A) = -3 and det(A) = -28. Find the eigenvalues of A with their algebraic multiplicities.
the eigenvalues of A are λ = 2 and μ = -2/3, with algebraic multiplicities 1 and 2, respectively.
We know that the trace of a matrix is the sum of its eigenvalues and the determinant is the product of its eigenvalues. Let the two distinct eigenvalues of A be λ and μ. Then, we have:
tr(A) = λ + μ + λ or μ (since the eigenvalues are distinct)
-3 = 2λ + μ ...(1)
det(A) = λμ(λ + μ)
-28 = λμ(λ + μ) ...(2)
We can solve this system of equations to find λ and μ.
From equation (1), we can write μ = -3 - 2λ. Substituting this into equation (2), we get:
-28 = λ(-3 - 2λ)(λ - 3)
-28 = -λ(2λ^2 - 9λ + 9)
2λ^3 - 9λ^2 + 9λ - 28 = 0
We can use polynomial long division or synthetic division to find that λ = 2 and λ = -2/3 are roots of this polynomial. Therefore, the eigenvalues of A are 2 and -2/3, and their algebraic multiplicities can be found by considering the dimensions of the eigenspaces.
Let's find the algebraic multiplicity of λ = 2. Since tr(A) = -3, we know that the sum of the eigenvalues is -3, which means that the other eigenvalue must be -5. We can find the eigenvector corresponding to λ = 2 by solving the system of equations (A - 2I)x = 0, where I is the 3 x 3 identity matrix. This gives:
|1-2 2 1| |x1| |0|
|2 1-2 1| |x2| = |0|
|1 1 1-2| |x3| |0|
Solving this system, we get x1 = -x2 - x3, which means that the eigenspace corresponding to λ = 2 is one-dimensional. Therefore, the algebraic multiplicity of λ = 2 is 1.
Similarly, we can find the algebraic multiplicity of λ = -2/3 by considering the eigenvector corresponding to μ = -3 - 2λ = 4/3. This gives:
|-1/3 2 1| |x1| |0|
| 2 -5/3 1| |x2| = |0|
| 1 1 5/3| |x3| |0|
Solving this system, we get x1 = -7x2/6 - x3/6, which means that the eigenspace corresponding to λ = -2/3 is two-dimensional. Therefore, the algebraic multiplicity of λ = -2/3 is 2.
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consider the function f ' (x) = x2 x − 56 (a) find the intervals on which f '(x) is increasing or decreasing. (if you need to use or –, enter infinity or –infinity, respectively.) increasing
, f'(x) is increasing on the intervals (-infinity, -2sqrt(14)) and (2sqrt(14), infinity), and decreasing on the interval (-2sqrt(14), 2sqrt(14)).
To find the intervals on which f'(x) is increasing or decreasing, we need to first find the critical points of f(x), i.e., the values of x where f'(x) = 0 or where f'(x) does not exist. Then, we can use the first derivative test to determine the intervals of increase and decrease.
We have:
f'(x) = x^2 - 56
Setting f'(x) = 0, we get:
x^2 - 56 = 0
Solving for x, we obtain:
x = ±sqrt(56) = ±2sqrt(14)
So, the critical points of f(x) are x = -2sqrt(14) and x = 2sqrt(14).
Now, we can use the first derivative test to find the intervals of increase and decrease. We construct a sign chart for f'(x) as follows:
| - 2sqrt(14) + 2sqrt(14) +
f'(x) | - 0 + 0 +
From the sign chart, we see that f'(x) is negative on the interval (-infinity, -2sqrt(14)), and positive on the interval (-2sqrt(14), 2sqrt(14)) and (2sqrt(14), infinity).
Therefore, f'(x) is increasing on the intervals (-infinity, -2sqrt(14)) and (2sqrt(14), infinity), and decreasing on the interval (-2sqrt(14), 2sqrt(14)).
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since cos(x) = − 8 17 and 180° < x < 270°, the angle is in quadrant iii , and the half-angle is in the range
The half-angle x/2 lies in the range 90° < x/2 < 135° (Quadrant II) and has a sine value of √(25/34).
Based on the given information, cos(x) = -8/17, and the angle x lies in the range 180° < x < 270°, which places it in Quadrant III. In this quadrant, cosine is negative, which confirms the value of cos(x). Now, we need to find the half-angle (x/2) and determine its range.
Since x is in Quadrant III, the angle x/2 will lie in the range 90° < x/2 < 135°, placing it in Quadrant II. In this quadrant, sine and cosine have opposite signs, so while cos(x) is negative, sin(x/2) will be positive. To find the value of sin(x/2), we can use the half-angle identity:
sin(x/2) = ±√[(1 - cos(x))/2] = √[(1 - (-8/17))/2] = √(25/34)
Since x/2 is in Quadrant II, sin(x/2) must be positive, so we take the positive square root:
sin(x/2) = √(25/34)
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Can someone please help me ASAP?? It’s due today!! I will give brainliest If It’s correct.
The statement that best describes the size of the cross section is C. The height of the cross section is the same as the height of the prism, and the width of the cross section is the same as the width of the faces of the prism.
How to describe the cross section size ?If a triangular prism is cut at a right angle to its base, the resulting section will resemble and have the same dimensions as the original triangular base of the prism.
The altitude of the cross-sectional triangle will equal the altitude of the triangular base of the prism. In a similar manner, the width of the triangular shape (its cross-section) will match the width of the base of the prism.
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Answer the statistical measures and create a box and whiskers plot for the following set of data. 6, 6, 7, 10, 10, 10, 11, 13, 13, 16, 16, 18, 18, 18 6,6,7,10,10,10,11,13,13,16,16,18,18,18
The statistical values of the data given are :
Median: 12Minimum: 6Maximum: 18First quartile: 10Third quartile: 16Interquartile Range: 6Box and whisker plotGiven the data : 6, 6, 7, 10, 10, 10, 11, 13, 13, 16, 16, 18, 18, 18 6,6,7,10,10,10,11,13,13,16,16,18,18,18
The statistical values in the data can be calculated thus:
Sort values in a sending order : 6,6,6,6,7,7,10,10,10,10,10,10,11,11,13,13,13,13,16,16,16,16,18,18,18,18,18,18
Minimum = 6 (least value)
Maximum= 18 (highest value)
Median = (N+1)/2 th term
Median = (11 + 13)/2 = 12
First quartile: 1/4(N+1)th term
First quartile = 10
Third quartile = 3/4(N+1)th term
Third quartile = 16
Interquartile Range: (Third Quartile - First quartile)
Interquartile range = 16-10 = 6
Therefore, the statistical values of a box and whisker plot are those calculated above .
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A company is designing a new cylindrical water bottle. The volume of the bottle will be 207 cm3. The height of the water bottle is 7.9 cm. What is the radius of the water bottle? Use 3.14 for pi.
The required radius of the water bottle is approximately 2.88 cm.
To find the radius of the cylindrical water bottle, we can use the formula for the volume of a cylinder:
Volume = π * radius² * height
Given that the volume of the bottle is 207 cm³ and the height is 7.9 cm, we can rearrange the formula to solve for the radius:
207 = 3.14 * radius² * 7.9
Dividing both sides of the equation by (3.14 * 7.9), we get:
radius² = 207 / (3.14 * 7.9)
radius² = 8.308
radius = √(8.308)
radius ≈ 2.88 cm (rounded to two decimal places)
Therefore, the radius of the water bottle is approximately 2.88 cm.
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f(x)=x2 x1 x write the equation of each asymptote for the functions
Asymptotes are typically found in rational functions (ratios of polynomials) or logarithmic or exponential functions.
An asymptote is a straight line that a curve approaches but never touches.
In other words, it is a line that the function gets closer and closer to but never actually intersects.
Now, let's take a look at the function f(x) = [tex]x^2[/tex]/x.
This function can be simplified to f(x) = x.
Therefore,
The graph of this function is simply a straight line passing through the origin with a slope of 1.
Since the graph of this function is a straight line, it does not have any vertical or horizontal asymptotes.
However, it is worth noting that the function has a hole at x = 0, since the value of the function is undefined at that point.
In summary, the equation of each asymptote for the function f(x) = x^2/x is as follows:
- There is no vertical asymptote.
- There is no horizontal asymptote.
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The equations of the asymptotes for the given function are:
Vertical asymptotes: x1 = 0 and x = 0
Horizontal asymptotes: None
Slant asymptote: y = x.
Since the given function is a rational function, it may have vertical, horizontal, and slant asymptotes.
Vertical Asymptotes:
The vertical asymptotes occur at those values of x where the denominator of the function becomes zero. Here, the denominator is x1x, so the vertical asymptotes are given by x1 = 0 and x = 0.
Horizontal Asymptotes:
To find the horizontal asymptotes, we can compare the degrees of the numerator and the denominator of the function. Here, the degree of the numerator is 2 and the degree of the denominator is 3, so there is no horizontal asymptote.
Slant Asymptotes:
Since the degree of the numerator is less than the degree of the denominator by exactly 1, we can find the slant asymptote by long division of the numerator by the denominator. Performing long division, we get:
x2 x1 x = (x + 0)x1 x - 0
So the slant asymptote is y = x.
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What is the parent function of y=-5(x-3)+7
(20.22) you are testing h0: μ = 0 against ha: μ ≠ 0 based on an srs of 6 observations from a normal population. what values of the t statistic are statistically significant at the α = 0.001 level?
The critical t-values are approximately ±4.032.
To determine the statistically significant values of the t statistic at the α = 0.001 level, with a sample size of 6 and a two-tailed test, refer to a t-distribution table.
To test H0: μ = 0 against Ha: μ ≠ 0 with an SRS of 6 observations from a normal population, follow these steps:
1. Determine the degrees of freedom (df): Since n = 6, the df = n - 1 = 5.
2. Identify the significance level (α): In this case, α = 0.001.
3. Determine the type of test: As Ha: μ ≠ 0, this is a two-tailed test.
4. Refer to a t-distribution table: Look up the critical t-values for a two-tailed test with df = 5 and α = 0.001.
5. Find the critical t-values: The table will show that the critical t-values are approximately ±4.032.
Therefore, t statistic values less than -4.032 or greater than 4.032 are statistically significant at the α = 0.001 level.
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You are a manager at a large retail store. During the first three months of the year, you ordered 35 boxes of cash-register paper each month. After realizing that this was more than necessary, you reduced the order to 28 boxes each month for the rest of the year.
Which expression shows how to calculate the mean number of boxes ordered per month?
The mean number of boxes ordered per month is approximately 29.75 boxes.
How to calculate the meanMean number of boxes = (Total number of boxes ordered in the first three months + Total number of boxes ordered for the rest of the year) / Total number of months
The total number of boxes ordered in the first three months would be 35 boxes/month * 3 months = 105 boxes.
For the rest of the year, the number of boxes ordered is reduced to 28 per month. Since there are 12 months in a year, the total number of boxes ordered for the rest of the year would be 28 boxes/month * 9 months = 252 boxes.
Mean number of boxes = (105 boxes + 252 boxes) / 12 months
Mean number of boxes = 357 boxes / 12 months
Mean number of boxes = 29.75 boxes/month
Therefore, the mean number of boxes ordered per month is approximately 29.75 boxes.
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what is the surface area of the pryamid below 10 7 7
The surface area of the given pyramid, can be found to be A. 648 square units.
How to find the surface area of pyramid ?First find the area of the square base :
= 12 x 12
= 144 square units
Then find the area of a single triangular face of the regular pyramid :
= 1 / 2 x base x height
= 1 / 2 x 12 x 21
= 126 square units
Seeing as there are 4 triangular faces, the total area would then be:
= 144 + ( 126 x 4 triangular faces )
= 648 square units
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Function A is represented by the equation y=3x+7.
Function B is represented by the table.
X
1
4
y
3
b
Stella claims that both functions will have the same rate of change no matter what the value of b is because the rate
of change of function A is 3 and the difference between the x-values in the table is 3.
Select all values of b that prove Stella's claim is not correct by making the rate of change of function B greater than
the rate of change of function A
All values of b that prove Stella's claim is not correct by making the rate of change of function B greater than the rate of change of function A are:
D. 15
E. 17
How to calculate the rate of change of a line?In Mathematics and Geometry, the rate of change (slope) of any straight line can be determined by using this mathematical equation;
Rate of change = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Rate of change = rise/run
Rate of change = (y₂ - y₁)/(x₂ - x₁)
When b = 6, the rate of change of function B is given by:
Rate of change = (6 - 3)/(4 - 1)
Rate of change = 3/3
Rate of change = 1 (not greater than 3).
When b = 12, the rate of change of function B is given by:
Rate of change = (12 - 3)/(4 - 1)
Rate of change = 9/3
Rate of change = 3 (not greater than 3).
When b = 15, the rate of change of function B is given by:
Rate of change = (15 - 3)/(4 - 1)
Rate of change = 12/3
Rate of change = 4 (greater than 3).
When b = 15, the rate of change of function B is given by:
Rate of change = (17 - 3)/(4 - 1)
Rate of change = 14/3
Rate of change = 4.7 (greater than 3).
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Missing information:
Select all values of b that prove Stella's claim is not correct by making the rate of change of function B greater than the rate of change of function A.
6
8
12
15
17
a polyhedron has 9 faces and 21 edges how many vertices are there? Please help
14 vertices in this polyhedron.
Euler's formula, which states that for any polyhedron (a three-dimensional solid object with flat polygonal faces), the number of vertices (V), edges (E), and faces (F) are related by the equation:
V - E + F = 2
This formula is named after the mathematician Leonhard Euler, who first discovered it in the 18th century.
It's a fundamental result in geometry and has many important applications.
The polyhedron has 9 faces and 21 edges.
We can plug these values into Euler's formula and solve for the number of vertices:
V - 21 + 9 = 2
Simplifying the left-hand side, we get:
V - 12 = 2
Adding 12 to both sides, we get:
V = 14
So the polyhedron has 14 vertices.
Euler's formula is a powerful tool for analyzing polyhedra, and can be used to derive many other results in geometry.
It's also related to other important mathematical concepts, such as topology and graph theory.
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question 2 item 2 which of the following series diverge? I. ∑n=1[infinity]cos(2n) II. ∑n=1[infinity](1+ 1/n) III. ∑n=1[infinity](n +1/n2) . A) ii only B) iii only C) i and ii only D) i, ii, and iii
From the given equation the series diverge is iii only. The correct answer is B.
First, note that the series in option I is not an alternating series, so we cannot apply the Alternating Series Test to check for convergence.
For option II, we can use the Limit Comparison Test. We compare it to the harmonic series, which is known to diverge:
lim(n→∞) (1 + 1/n) / (1/n) = lim(n→∞) (n + 1) / n = 1
Since the limit is positive and finite, the series in option II diverges.
For option III, we can use the Divergence Test, which states that if the limit of the terms of the series does not approach zero, then the series must diverge.
lim(n→∞) (n + 1/n^2) = ∞
Since the limit is infinite, the series in option III also diverges.
Therefore, the answer is (B) iii only.
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Triangle T is enlarged with a scale factor of 4 and centre (0 0 A) whats are the coordinates of A and A b) what are the cordinates of B
After enlarging triangle ABC with a scale factor of 3 about the origin (0, 0), the coordinates of A' and B' are (12, 0).
To find the coordinates of A' and B' after the enlargement, we can use the formula for enlarging a point (x, y) by a scale factor of k about a center point (h, k):
A' = (k * (A - O)) + O
B' = (k * (B - O)) + O
Given that AB = 4 cm and the scale factor is 3, we can assume that point O is the origin (0, 0).
Let's calculate A'
A' = (3 * (A - O)) + O
= 3 * (A - O) + O
= 3 * (4, 0) + (0, 0)
= (12, 0) + (0, 0)
= (12, 0)
Therefore, A' has the coordinates (12, 0).
Now let's calculate B'
B' = (3 * (B - O)) + O
= 3 * (B - O) + O
= 3 * (4, 0) + (0, 0)
= (12, 0) + (0, 0)
= (12, 0)
Therefore, B' also has the coordinates (12, 0).
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--The given question is incomplete, the complete question is given below " A triangle ABC is enlarged, about the point O as centre of enlargement, and the scale factor is 3. Find A'B', if AB = 4cm."--
If 36 = 6 × 6 = 62, then 1 expressed as a power with the base 6 is ________.
To express 1 as a power with the base 6, we can use logarithms.
We have the equation:
[tex]36 = 6^2[/tex]
Taking the logarithm base 6 of both sides:
[tex]\log_6(36) = \log_6(6^2)[/tex]
Applying the logarithmic property, we can bring down the exponent:
[tex]\log_6(36) = 2\log_6(6)[/tex]
Since [tex]\log_b(b) = 1[/tex], where b is the base of the logarithm, we have:
[tex]\log_6(36) = 2 \times 1[/tex]
Simplifying the expression:
[tex]\log_6(36) = 2[/tex]
Therefore, 1 expressed as a power with the base 6 is [tex]6^0[/tex].
A mother divided her land of 141/4 acres among her 5 adopted adult children. samuel received 11 acres, sophia received 9 acres, anthony received 8 acres, jasmine received 5 acres, and juan received 4 1/4 acres.
which of the children received more land if the land was divided evenly among them compared to the way the mother divided it?
a)anthony
b)jasmine
c)juan
d)sofia
The child who received more land if the land was divided evenly among them compared to the way the mother divided it is Sofia. Option (d) is correct.
A mother divided her land of 141/4 acres among her 5 adopted adult children such that Samuel received 11 acres, Sophia received 9 acres, Anthony received 8 acres, Jasmine received 5 acres, and Juan received 4 1/4 acres.
Among the given children, the child who received more land if the land was divided evenly among them compared to the way the mother divided it is Sofia.
To determine the land received by each child if the land was divided evenly among them, divide the total area by the number of children.
Therefore, each child would receive 141/4 ÷ 5 acres.
141/4 ÷ 5 = 113/20 ≈ 5.65 acres.
(to two decimal places)
Approximately, each child would receive 5.65 acres of land.
Which is not how the mother divided her land among the children.
Now, let's compare the area of land that each child received with the 5.65 acres they would have received if the land was divided evenly among them.Samuel received 11 acres.
11 > 5.65
So, Samuel received more land than they would have received if the land was divided evenly among them.Sophia received 9 acres.
9 < 5.65
So, Sophia received less land than they would have received if the land was divided evenly among them.
Anthony received 8 acres.
8 < 5.65
So,
Anthony received less land than they would have received if the land was divided evenly among them.
Jasmine received 5 acres.
5 = 5.65
So, Jasmine received the same land as they would have received if the land was divided evenly among them.
Juan received 4 1/4 acres.
21/4 = 5.25 and
5.25 < 5.65
So, Juan received less land than they would have received if the land was divided evenly among them.
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Lerato spends 2 hours 30 minutes talking to her relatives during on the month of April. Calculate how much this cost her. 90 cents per minute (bill per second).
Lerato spends 2 hours 30 minutes talking to her relatives during on the month of April.
The cost is 90 cents per minute, so first we need to convert the total time Lerato spent on phone calls to minutes.To do that, we can use the following calculation:2 hours 30 minutes = 2 × 60 + 30 = 150 minutesNow,
we can multiply the total minutes by the cost per minute:$150 \text{ minutes} \times 90 \text{ cents/minute} = 13500 \text{ cents} $
But we need to convert cents to Rand, so we divide by 100 (since there are 100[tex]$150 \text{ minutes} \times 90 \text{ cents/minute} = 13500 \text{ cents} $[/tex] cents in one Rand):$13500 \text{ cents} ÷ 100 = 135 \text{ Rand}$
Therefore,
Lerato spent 135 Rand talking to her relatives during the month of April.
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320.72−(6109.7/3.4) express your answer to the appropriate number of significant digits.
Number of significant digits is -169.
What is the result of 320.72 - (6109.7 divided by 3.4), rounded to the appropriate number of significant digits?In the given expression, 320.72 is subtracted by the result of dividing 6109.7 by 3.4.
To express the answer with the appropriate number of significant digits, we must consider the significant digits in each component of the calculation.
Starting with the division, 6109.7 divided by 3.4 yields approximately 1799.9117647058824.
Since 3.4 has two significant digits, the division result should also have two significant digits. Therefore, we round it to 1800.
Subtracting 1800 from 320.72 gives us -1479.28. However, since 320.72 has five significant digits, the final answer should have the same number of significant digits.
Rounding to the appropriate number of significant digits, we obtain -169.
Therefore, the result of the given expression, rounded to the appropriate number of significant digits, is -169.
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use the fact that y = x is a solution of the homogeneous equation x 2 y 00 − 2xy0 2y = 0 to completely completely solve the differential equation x 2 y 00 − 2xy0 2y = x 2
We are given that the equation
x^2 y'' - 2xy'^2 y = 0
has a solution y = x, which satisfies the homogeneous equation. To find the general solution of the nonhomogeneous equation
x^2 y'' - 2xy'^2 y = x^2,
we can use the method of undetermined coefficients.
Assume a particular solution of the form y_p(x) = Ax^2 + Bx. Then, we have
y_p'(x) = 2Ax + B,
y_p''(x) = 2A.
Substituting these into the nonhomogeneous equation, we get
x^2 (2A) - 2x(2Ax + B)^2 (Ax^2 + Bx) = x^2.
Simplifying and collecting terms, we get
2A - 2B^2 = 1.
We can choose A = 1/2 and B = -1/2 to satisfy this equation. Therefore, a particular solution of the nonhomogeneous equation is
y_p(x) = (1/2)x^2 - (1/2)x.
The general solution of the nonhomogeneous equation is then
y(x) = c1 x + c2 - (1/2)x + (1/2)x^2,
where c1 and c2 are constants determined by the initial or boundary conditions of the problem.
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find a cartesian equation for the curve and identify it. r = 3 cos()
a. hyperbola b. parabola c. circle d. ellipse
e. limaçon
The limaçon has a characteristic loop is evident in the Cartesian equation. e.
The given equation is in polar form and it represents a limaçon.
We can convert this equation into Cartesian form using the following equations:
x = r cosΘ()
y = r sin(Θ)
Substituting r = 3 cos(Θ) get:
x = 3 cos(Θ) cos(Θ)
= 3 cos²(Θ)
y = 3 cos(Θ) sin(Θ)
= 3 sin(Θ) cos(Θ)
= (3/2) sin(2Θ)
The Cartesian equation of the curve is:
x²/9 + y²/27 = cos²(Θ) + (1/4)sin²(2Θ)
This equation represents a limaçon is a type of curve formed by a point moving around a fixed point while a second point moves around the first.
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If i have 45lbs of rice and 8 bags how much rice would go in each ba
Each bag would contain approximately 5.625 lbs of rice.
If you have 45 lbs of rice and 8 bags, then you can calculate how much rice would go in each bag by dividing the total amount of rice by the number of bags. Here's how to do it:1. Convert the weight of rice to ounces. There are 16 ounces in 1 pound, so 45 lbs of rice is equal to 720 ounces.2. Divide the total amount of rice by the number of bags. 720 ounces ÷ 8 bags = 90 ounces per bag.So each bag would contain 90 ounces of rice.
To convert this to pounds, you would divide by 16: 90 ounces ÷ 16 = 5.625 lbs per bag. Therefore, each bag would contain approximately 5.625 lbs of rice.Keep in mind that the weight of rice in each bag may not be exact due to slight variations in weight and the way the rice is packed.
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The table shows the location of different animals compared to sea level. Determine if each statement is true or false.
1: The distance between the fish and
the dolphin is |–3812 – (–8414)| = 4534 feet. True or false?
2: The distance between the shark
and the dolphin is |–145 – 8414| = 22934 feet. T or F
3: The distance between the fish and
the bird is |1834 – (–3812)| = 5714 feet. T or F
4: The distance between the shark
and the bird is |1834 – 145| = 12634 feet. T or F
1. False 2. False 3. False
4. The distance between the shark and the bird is |1834 – 145| = 12634 feet. False
To determine the truth value of each statement, we need to calculate the absolute differences between the given coordinates.
1: The distance between the fish and the dolphin is |–3812 – (–8414)| = |3812 + 8414| = 12226 feet.
Since the calculated distance is 12226 feet, the statement "The distance between the fish and the dolphin is 4534 feet" is false.
2: The distance between the shark and the dolphin is |–145 – 8414| = |-145 - 8414| = 8559 feet.
Since the calculated distance is 8559 feet, the statement "The distance between the shark and the dolphin is 22934 feet" is false.
3: The distance between the fish and the bird is |1834 – (–3812)| = |1834 + 3812| = 5646 feet.
Since the calculated distance is 5646 feet, the statement "The distance between the fish and the bird is 5714 feet" is false.
4: The distance between the shark and the bird is |1834 – 145| = |1834 - 145| = 1689 feet.
Since the calculated distance is 1689 feet, the statement "The distance between the shark and the bird is 12634 feet" is false.
Therefore:
False
False
False
False
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The power booster can be operated by engine vacuum or through hydraulic pressure, which is
usually generated by the power steering pump or an electric-driven pump.
The power booster can be operated by engine vacuum or through hydraulic pressure, which is usually generated by the power steering pump or an electric-driven pump.
Therefore, the terms "hydraulic pressure" and "power steering pump" are relevant to the operation of the power booster.The power booster, also known as the brake booster, is a device that helps in applying more force to the brakes with less pressure on the brake pedal. This results in an enhanced braking performance. The power booster can be operated using either of two methods:
Engine vacuum, or Hydraulic pressure, which is produced by the power steering pump or an electric-driven pump.
In both methods, the power booster serves to augment the force that is applied to the brake master cylinder.
This increases the hydraulic pressure that is applied to the brakes, resulting in an enhanced braking performance.
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evaluate ∮cxdx + ydy / x^2 + y^2, where c is any jordan curve whose interior does not contain the origin, traversed counterclockwise. ∮c xdx + ydy / x^2 + y^2 = _______
The origin traversed counterclockwise is ∮c xdx + ydy / x² + y² = 2πi
This is a classic example of a line integral in complex analysis.
To evaluate this integral, we need to use the Cauchy Integral Formula, which states that if f(z) is analytic inside and on a simple closed contour C, then:
∮C f(z) dz = 2πi Res(f, z)
Res(f, z) denotes the residue of f at z.
In this case, we have f(z) = x + iy / x² + y², and we want to integrate over a Jordan curve C that encloses the origin.
Since f(z) is analytic everywhere except at z = 0, we can apply the Cauchy Integral Formula to compute the value of the integral.
To do so, we need to find the residue of f(z) at z = 0.
We can do this by computing the Laurent series expansion of f(z) around z = 0:
f(z) = (x + iy) / (x² + y²) = (1 / z) [(x / z) + (iy / z)] = (1 / z) [1 - (1 / 2) z² + ...]
The coefficient of the z⁻¹ term is 1, which means that the residue of f(z) at z = 0 is 1.
The Cauchy Integral Formula to evaluate the integral:
∮C xdx + ydy / x² + y² = 2πi Res(f, z) = 2πi
The value of the integral is 2πi.
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The value of the line integral is zero for any Jordan curve c whose interior does not contain the origin, traversed counterclockwise.
This integral can be evaluated using Green's Theorem, which states that the line integral of a vector field around a simple closed curve is equal to the double integral of the curl of the vector field over the region enclosed by the curve.
Let F(x, y) = (x/(x^2 + y^2), y/(x^2 + y^2)) be the vector field in question. Then the curl of F is given by:
curl(F) = (∂y/∂x - ∂x/∂y) = (0 - 0)i - (0 - 0)j + (x^2 + y^2)^(-2) (1 - 1)k = 0i + 0j + 0k
Since the curl of F is zero, we know that F is a conservative vector field, which implies that the line integral of F around any closed curve is zero.
Therefore, we have:
∮c xd + yd / ^2 + ^2 = ∮c F · dr = 0
where the last step follows from the fact that F is conservative.
Hence, the value of the line integral is zero for any Jordan curve c whose interior does not contain the origin, traversed counterclockwise.
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consider the following equation of an ellipse. 25x^2 49y^2−200x−825=0 step 3 of 4 : find the endpoints of the major and minor axes of this ellipse.
To find the endpoints of the major and minor axes, we first need to rewrite the equation of the ellipse in standard form:
$$\frac{(x-h)^2}{a^2} + \frac{(y-k)^2}{b^2} = 1$$
where (h,k) is the center of the ellipse, a is the distance from the center to the endpoints of the major axis, and b is the distance from the center to the endpoints of the minor axis.
Dividing both sides of the given equation by 25, we get:
$$\frac{x^2}{7^2} + \frac{y^2}{5^2} - \frac{8x}{7} - \frac{33}{5^2} = 1$$
Comparing this with the standard form equation, we see that:
- h = 8/7
- k = 0
- a = 7
- b = 5
So the center of the ellipse is (8/7,0), the endpoints of the major axis are (8/7 + 7, 0) = (57/7,0) and (8/7 - 7,0) = (-45/7,0), and the endpoints of the minor axis are (8/7, 5) and (8/7, -5).
Therefore, the endpoints of the major axis are (57/7,0) and (-45/7,0), and the endpoints of the minor axis are (8/7, 5) and (8/7, -5).
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