. Temoso borrowed R1 000 from the bank for 3 years at 8% compound interes Without using a formula, calculate how much Temoso owes the bank at the end of three years.​

Answer:

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Find the amount of work in man*days and then divide the result by 20:

Hence the same work will be completed by 225 men.

Answer:

Step-by-step explanation:

this is a boook

The logarithmic expressions that have been evaluated correctly to the nearest hundredth are as follows;

A. log₃ 8 = 1.89B. log₃ 6 = 1.63C. log₄ 5 = 1.16D. log₂ 32 = 5.00E. log₄ 7 = 1.49

Exponent is defined as the method of expressing large numbers in terms of powers. That means, exponent refers to how many times a number multiplied by itself. For example, 6 is multiplied by itself 4 times, i.e. 6 × 6 × 6 × 6. This can be written as 64. Here, 4 is the exponent and 6 is the base.

Logarithm, the exponent or power to which a base must be raised to yield a given number. Expressed mathematically, x is the logarithm of n to the base b if bx = n, in which case one writes x = logb n. For example, 23 = 8; therefore, 3 is the logarithm of 8 to base 2, or 3 = log2 8.

Therefore, the logarithmic expressions that have been evaluated correctly to the nearest hundredth are;

B. log₃ 6 = 1.63

C. log₄ 5 = 1.16

E. log₄ 7 = 1.49.

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The series converges and its value is 8 - 1/b.

To evaluate the telescoping series ∑(infinity) 8^(1/n) - b^(1/(n + 1)), we need to use the property of telescoping series where most of the terms cancel out.

First, we can write the second term as b^(1/(n+1)) = (1/b)^(-1/(n+1)). Now, we can use the fact that a^(1/n) can be written as (a^(1/n) - a^(1/(n+1))) / (1 - 1/(n+1)) for any positive integer n. Using this property, we can rewrite the first term of the series as:

8^(1/n) = (8^(1/n) - 8^(1/(n+1))) / (1 - 1/(n+1))

Similarly, we can rewrite the second term of the series as:

(1/b)^(-1/(n+1)) = ((1/b)^(-1/(n+1)) - (1/b)^(-1/(n+2))) / (1 - 1/(n+2))

Now, we can combine the terms and get:

∑(infinity) 8^(1/n) - b^(1/(n + 1)) = (8^(1/1) - 8^(1/2)) / (1 - 1/2) + (8^(1/2) - 8^(1/3)) / (1 - 1/3) + (8^(1/3) - 8^(1/4)) / (1 - 1/4) + ... + ((1/b)^(-1/n)) / (1 - 1/(n+1))

As we can see, most of the terms cancel out, leaving us with:

∑(infinity) 8^(1/n) - b^(1/(n + 1)) = 8 - 1/b

So, the series converges and its value is 8 - 1/b.

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The function is f(x) = -2x + 5, and the constants m and b are -2 and 5, respectively.

Given the function f(x) = mx + b, where m and b are constants, we know that:

limx→2 f(x) = 1

limx→3 f(x) = -1

Using the definition of a limit, we can rewrite these statements as:

For any ε > 0, there exists δ1 > 0 such that if 0 < |x - 2| < δ1, then |f(x) - 1| < ε.

For any ε > 0, there exists δ2 > 0 such that if 0 < |x - 3| < δ2, then |f(x) + 1| < ε.

We want to determine the values of m and b that satisfy these conditions. To do so, we will use the fact that if a function has a limit as x approaches a point, then the left-hand and right-hand limits must exist and be equal to each other. In other words, we need to ensure that the left-hand and right-hand limits of f(x) exist and are equal to the given limits.

Let's start by finding the left-hand limit of f(x) as x approaches 2. We have:

limx→2- f(x) = limx→2- (mx + b) = 2m + b

Next, we find the right-hand limit of f(x) as x approaches 2:

limx→2+ f(x) = limx→2+ (mx + b) = 2m + b

Since the limit as x approaches 2 exists, we know that the left-hand and right-hand limits must be equal. Thus, we have:

2m + b = 1

Similarly, we can find the left-hand and right-hand limits of f(x) as x approaches 3:

limx→3- f(x) = limx→3- (mx + b) = 3m + b

limx→3+ f(x) = limx→3+ (mx + b) = 3m + b

Since the limit as x approaches 3 exists, we know that the left-hand and right-hand limits must be equal. Thus, we have:

3m + b = -1

We now have two equations:

2m + b = 1

3m + b = -1

We can solve for m and b by subtracting the first equation from the second:

m = -2

Substituting this value of m into one of the equations above, we can solve for b:

2(-2) + b = 1

b = 5

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The given series is divergent.

We can determine the convergence or divergence of the given series using the nth term test. According to this test, if the nth term of a series does not approach zero as n approaches infinity, then the series is divergent.

Here, the nth term of the series is given by 9e^(n+3)/(n(n+1)). We can simplify this expression by using the fact that e^(n+3) = e^3 * e^n. Therefore, we have:

9e^(n+3)/(n(n+1)) = 9e^3 * (e^n / n(n+1))

As n approaches infinity, the term e^n grows faster than n(n+1). Therefore, the expression e^n / n(n+1) does not approach zero, and the nth term of the series does not approach zero either. Thus, by the nth term test, the series is divergent.

Therefore, the given series is divergent.

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The limit of (8x - 8ln(x)) as x approaches 1 can be evaluated using L'Hôpital's rule or previously learned methods. The limit is equal to 8.

To explain this, we can use L'Hôpital's rule, which states that if the limit of the quotient of two functions as x approaches a certain value is of the form 0/0 or ∞/∞, then the limit can be evaluated by taking the derivative of the numerator and denominator separately.

In this case, we have the limit of (8x - 8ln(x)) as x approaches 1. This limit is of the form 0/0, as plugging in x = 1 results in an indeterminate form. By applying L'Hôpital's rule, we differentiate the numerator and denominator separately.

Differentiating the numerator, we get 8, and differentiating the denominator, we get 8/x. Taking the limit of the new quotient as x approaches 1, we obtain the result of 8/1 = 8.

Therefore, the limit of (8x - 8ln(x)) as x approaches 1 is equal to 8.

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The z-score simply tells us how many standard deviations away from the mean a particular value falls, and we use that information to assess whether the value is typical or unusual in the given context.

To find the z-score corresponding to the given value of a 100-meter sprint time of 15.0 seconds, we need to use the formula z = (x - μ) / σ, where x is the value, μ is the mean, and σ is the standard deviation. Plugging in the values, we get:

z = (15.0 - 17.5) / 2.1
z = -1.19

This means that the given value is 1.19 standard deviations below the mean. To determine whether it is unusual, we need to compare the absolute value of the z-score to 2.00. Since 1.19 is less than 2.00 and greater than -2.00, we can conclude that the time of 15.0 seconds is not unusual in this context.

In other words, while the time is below the mean, it is not so far below that it is considered unusual or unexpected. The z-score simply tells us how many standard deviations away from the mean a particular value falls, and we use that information to assess whether the value is typical or unusual in the given context.

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A time of 15.0 seconds is within 2 standard deviations from the mean and is not considered unusual.

To find the z-score, we use the formula:

z = (x - μ) / σ

where x is the value we want to convert to a z-score, μ is the mean, and σ is the standard deviation.

Plugging in the values given in the problem, we have:

z = (15.0 - 17.5) / 2.1

z = -1.19

So the z-score corresponding to the 15.0 second time is -1.19.

To determine whether this value is unusual, we compare the absolute value of the z-score to 2.00. Since |-1.19| = 1.19 is less than 2.00, we can conclude that the value of 15.0 seconds is not unusual according to our definition.

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The right Riemann sum for f(x) = x + 1 on [0, 5] with n = 30 can be written as:

R30 = (b-a)/n * sum(i=1 to n) f(xi)

where a = 0, b = 5, n = 30, xi = a + i(b-a)/n = i/6

So, the right Riemann sum is:

R30 = (5-0)/30 * sum(i=1 to 30) (i/6 + 1)

R30 = (1/6) * sum(i=1 to 30) i + (1/6) * sum(i=1 to 30) 1

Using the formulas for the sums of the first n positive integers and the sum of n ones, we get:

sum(i=1 to 30) i = n(n+1)/2 = 30(30+1)/2 = 465

sum(i=1 to 30) 1 = n = 30

Therefore,

R30 = (1/6) * (465/6 + 30)

R30 = 41.25

So, the right Riemann sum is 41.25.

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At t = 1, the surge function C(t) is increasing and decreasing at an inflection point.

To determine the behavior of the surge function C(t) at t = 1, we need to analyze its first and second derivatives.

The first derivative of C(t) with respect to t is:

C'(t) = 10e^(-0.5t) - 5te^(-0.5t)

The second derivative of C(t) with respect to t is:

C''(t) = 2.5te^(-0.5t) - 10e^(-0.5t)

To find out whether C(t) is decreasing or increasing at t = 1, we need to evaluate the sign of C'(t) at t = 1. Plugging in t = 1, we get:

C'(1) = 10e^(-0.5) - 5e^(-0.5) = 5e^(-0.5) > 0

Since C'(1) is positive, we can conclude that C(t) is increasing at t = 1.

To determine whether C(t) is increasing at an inflection point or decreasing at a maximum, we need to evaluate the sign of C''(t) at t = 1. Plugging in t = 1, we get:

C''(1) = 2.5e^(-0.5) - 10e^(-0.5) = -7.5e^(-0.5) < 0

Since C''(1) is negative, we can conclude that C(t) is decreasing at an inflection point at t = 1.

In summary, at t = 1, the surge function C(t) is increasing and decreasing at an inflection point.

The fact that the second derivative is negative tells us that the function is concave down, meaning that its rate of increase is slowing down. Thus, even though C(t) is increasing at t = 1, it is doing so at a decreasing rate.

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The total net pay for the week is $433.Answer: $433 .

Rheanna Boggs, an interior fabricator for a large design firm, pays $45 for medical insurance, $21 for union dues, and $10 for a stock option plan weekly. Her gross pay is $525 and she claims one allowance. So, we need to calculate the total net pay for the week. For this, we need to calculate the total amount of deductions that Rheanna Boggs has to make.

Deductions can be calculated as shown below:$45 + $21 + $10 = $76Total deductions made by Rheanna Boggs = $76Now, we can calculate the taxable income. For this, we need to use Table 2.3. As Rheanna Boggs is single and claims one allowance, we will use the row for "Single" and column for "1" to find the value of withholding allowance.

Taxable income = Gross pay − Deductions − Withholding allowance= $525 − $76 − $77 = $372Now, we can calculate the federal tax. For this, we need to use Table 2.4. As the taxable income is $372 and the number of allowances is 1, we can use the row for "$370 to $374" and column for "1".Federal tax = $16Now, we can calculate the total net pay for the week. This can be calculated as shown below:Total net pay = Gross pay − Deductions − Federal tax= $525 − $76 − $16 = $433Therefore, the total net pay for the week is $433.Answer: $433 .

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Green's Theorem states that the line integral of a vector field F around a closed path C is equal to the double integral of the curl of F over the region enclosed by C. Mathematically, it can be expressed as:

∮_C F · dr = ∬_R curl(F) · dA

where F is a vector field, C is a closed path, R is the region enclosed by C, dr is a differential element of the path, and dA is a differential element of area.

To use Green's Theorem, we first need to calculate the curl of F:

curl(F) = (∂F_2/∂x - ∂F_1/∂y)k

where k is the unit vector in the z direction.

We have:

F(x,y) = (e^x -3 y)i + (e^y + 6x)j

So,

∂F_2/∂x = 6

∂F_1/∂y = -3

Therefore,

curl(F) = (6 - (-3))k = 9k

Next, we need to parameterize the path C. We are given that C is the circle of radius 2 centered at the origin, which can be parameterized as:

r(θ) = 2cosθ i + 2sinθ j

where θ goes from 0 to 2π.

Now, we can apply Green's Theorem:

∮_C F · dr = ∬_R curl(F) · dA

The left-hand side is the line integral of F around C. We have:

F · dr = F(r(θ)) · dr/dθ dθ

= (e^x -3 y)i + (e^y + 6x)j · (-2sinθ i + 2cosθ j) dθ

= -2(e^x - 3y)sinθ + 2(e^y + 6x)cosθ dθ

= -4sinθ cosθ(e^x - 3y) + 4cosθ sinθ(e^y + 6x) dθ

= 2(e^y + 6x) dθ

where we have used x = 2cosθ and y = 2sinθ.

The right-hand side is the double integral of the curl of F over the region enclosed by C. The region R is a circle of radius 2, so we can use polar coordinates:

∬_R curl(F) · dA = ∫_0^(2π) ∫_0^2 9 r dr dθ

= 9π

Therefore, we have:

∮_C F · dr = ∬_R curl(F) · dA = 9π

Thus, the work done by the force F on a particle that is moving counterclockwise around the closed path C is 9π.

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The explicit, implicit, and Crank-Nicholson methods were used to estimate the temperature distribution for the rod.

The explicit, implicit, and Crank-Nicholson methods are numerical techniques used to estimate the temperature distribution for a given rod. These methods are commonly employed in solving heat transfer problems, where the temperature distribution along the rod needs to be determined.

The explicit method, also known as the forward Euler method, is a straightforward approach that calculates the temperature at each point on the rod using the values from the previous time step. It is computationally efficient but can be numerically unstable under certain conditions.

The implicit method, also known as the backward Euler method, solves the heat equation using the values from the current time step, resulting in a system of equations that needs to be solved simultaneously. This method is unconditionally stable but requires more computational resources compared to the explicit method.

The Crank-Nicholson method is a combination of the explicit and implicit methods, aiming to provide a compromise between stability and efficiency. It calculates the temperature distribution by averaging the values obtained from the explicit and implicit methods. This approach offers both stability and improved accuracy, making it a popular choice for many heat transfer simulations.

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The remainder when f(x) = x^3 + 8x^2 - 25x + 400 is divided by (x - 13) is 3624.

To find the remainder when f(x) = x^3 + 8x^2 - 25x + 400 is divided by (x - 13), we can use the Remainder Theorem.

The Remainder Theorem states that if a polynomial f(x) is divided by (x - c), the remainder is f(c).

Step 1: Substitute the value of c from (x - 13) into the function f(x).
In this case, c = 13, so we'll evaluate f(13).

Step 2: Evaluate f(13).
f(13) = (13)^3 + 8(13)^2 - 25(13) + 400

Step 3: Calculate the value of f(13).
f(13) = 2197 + 8(169) - 25(13) + 400
f(13) = 2197 + 1352 - 325 + 400
f(13) = 3624

So, the remainder when f(x) = x^3 + 8x^2 - 25x + 400 is divided by (x - 13) is 3624.

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The solution for x is x = (y - 5) / 3.

To solve the equation y = 5 + 3x for x, we need to isolate the variable x on one side of the equation. Here's the step-by-step solution:

Start with the equation: y = 5 + 3x.

Subtract 5 from both sides to isolate the term with x:

y - 5 = 5 + 3x - 5.

Simplifying:

y - 5 = 3x.

Divide both sides by 3 to solve for x:

(y - 5) / 3 = 3x / 3.

Simplifying:

(y - 5) / 3 = x.

So, the solution for x is x = (y - 5) / 3.

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Yes, the curve can be drawn with parametric equations.The equation given is =2cos(), where the parameter is denoted by . We can express the - and -coordinates of the curve as follows:
=2cos()
=2sin()

To see why this works, consider the unit circle centered at the origin. Let a point on the circle be given by the angle , measured counterclockwise from the positive -axis. Then, the -coordinate of the point is given by sin and the -coordinate is given by cos.
In our case, the factor of 2 in front of cos and sin simply scales the curve. The fact that the curve is traced clockwise as increases is accounted for by the negative sign in front of sin.
To plot the curve, we can choose a range of values for that covers at least one complete cycle of the cosine function (i.e., from 0 to 2). For example, we could choose =0 to =2. Then, we can evaluate and for each value of in this range, and plot the resulting points in the - plane.
Overall, the parametric equations =2cos() and =-2sin() describe a curve that is a clockwise circle of radius 2, centered at the origin.

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We can see here that the statement that is true for the data sets is: B. The mean study time of students in Class B is less than students in Class A

A dataset is a grouping of structured and ordered data that is typically displayed in tabular form. It may contain data about a certain subject and is employed for a variety of tasks, including research, analysis, and decision-making.

A dataset may be modest or large and contain a variety of data kinds, including text, numerical, and categorical data.

The given answer above is true because:

Mean study time for Class A = (2 + 5 + 7 + 6 + 4 + 3 + 8 + 7 + 4 + 5 + 7 + 6 + 3 + 5 + 4 + 2 + 4 + 6 + 3 + 5)/20 = 96/20 = 4.8 ≈ 5

Mean study time for Class B = (3 + 7 + 6 + 4 + 3 + 2 + 4 + 5 + 6 + 7 + 2 + 2 +  2 + 3 + 4 + 5 + 2 + 2 + 5 + 6)/20 = 80/20 = 4

Thus, we see that mean study time of students in Class B is less than students in Class A.

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The correct statement is The mean study time of students in Class B is less than students in Class A. Option B

The mean and median are two measures of central tendency that tells of the value of a dataset.

You find the mean by adding up all the values in the dataset and dividing by the total number of values. This gives you the average value of the dataset. For example,

Class A mean is 2 + 5 + 7 + 6 + 4 + 3 + 8 + 7 + 4 + 5 + 7 + 6 + 3 + 5 + 4 + 2 + 4 + 6 + 3 + 5 = 96. 96/20 = 4.8

Class B mean is 3 + 7 + 6 + 4 + 3 + 2 + 4 + 5 + 6 + 7 + 2 + 2 + 2 + 3 + 4 + 5 + 2 + 2 + 5 + 6 = 80. 80/20 = 4

Class A media is 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8.

the middle figures are 5 and 5. We plus them and divide by to. It give use 5.

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Answer: The total cost of the call Samantha made to Adila is R3072. Samantha would pay R73,728 if she made this call every month for two years.

The cost of the call Samantha made to Adila is R3,20 per 30 seconds. This is equivalent to R6,40 per minute. The call lasted for 24 minutes. Therefore, Samantha would have paid R153,60 for the call she made to Adila.If Samantha were to make the same call every month for two years, which is equivalent to 24 months, she would pay R153,60 x 24 = R3,686,40. This means that Samantha would have spent R3,686,40 on phone calls if she called Adila for 24 minutes every month for two years.

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The correct indefinite integral of (-1x^4 - 2x) dx is -1/5 * x^5 - 2x + C, where C represents the constant of integration.

Based on the given information, the problem is to determine the indefinite integral of the expression (-1x^4 - 2x) dx, using capital C for the free constant.

It appears that the previous answer given for this problem was incorrect.

To solve this problem, we need to use the rules of integration, which include the power rule, constant multiple rule, and sum/difference rule.

The power rule states that the integral of x^n is (x^(n+1))/(n+1), where n is any real number except -1.

The constant multiple rules state that the integral of k*f(x) is k times the integral of f(x), where k is any constant. The sum/difference rule states that the integral of (f(x) + g(x)) is the integral of f(x) plus the integral of g(x), and the same goes for subtraction.

Using these rules, we can break down the given expression (-1x^4 - 2x) dx into two separate integrals: (-1x^4) dx and (-2x) dx.

Starting with (-1x^4) dx, we can use the power rule to integrate: (-1x^4) dx = (-1 * 1/5 * x^5) + C1, where C1 is the constant of integration for this integral.

Next, we can integrate (-2x) dx using the constant multiple rule: (-2x) dx = -2 * (x^1/1) + C2 = -2x + C2, where C2 is the constant of integration for this integral.

To get the final answer, we can combine the two integrals: (-1x^4 - 2x) dx = (-1 * 1/5 * x^5) + C1 - 2x + C2 = -1/5 * x^5 - 2x + C, where C is the combined constant of integration (C = C1 + C2).

We can simplify this expression by using capital C to represent the combined constant of integration, giving us:

(-1x^4 - 2x) dx = -1/5 * x^5 - 2x + C

Therefore, the correct indefinite integral of (-1x^4 - 2x) dx is -1/5 * x^5 - 2x + C, where C represents the constant of integration.

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The length of segment DC is given as follows:

DC = 9.

The geometric mean theorem states that the length of the altitude drawn from the right angle of a triangle to its hypotenuse is equal to the geometric mean of the lengths of the segments formed on the hypotenuse.

The bases in this problem are given as follows:

DC and 4.

The altitude segment has the length given as follows:

6.

The geometric mean of DC and 4 is of 6, hence the length of DC is obtained as follows:

4DC = 6²

4DC = 36

DC = 36/4

DC = 9.

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The correct statement about the independence of two random variables is Statement A: Two random variables are independent if their joint probability mass function (pmf) or their joint probability density function (pdf) is the product of the two marginal pmf's or pdf's.

Statement C is incorrect because two random variables can have a covariance of zero without being independent. Covariance measures the linear relationship between two variables, but independence goes beyond that to include any type of relationship between the variables.

Statement B is also incorrect because independence of discrete random variables does not require every entry in the joint probability table to be the product of the corresponding row and column marginal probabilities. This requirement is only applicable to the case of independence for jointly distributed random variables.

Therefore, the correct statement is Statement A, which defines the criteria for independence based on the joint probability mass function or probability density function.

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The Maclaurin series for f(x) is f(x) = 16x^2 - 914.6667x^3 + O(x^4).

To find the Maclaurin series for the function f(x) = 8x^2sin(7x), we need to compute its derivatives and evaluate them at x=0:

f(x) = 8x^2sin(7x)

f'(x) = 16xsin(7x) + 56x^2cos(7x)

f''(x) = 16(2cos(7x) - 49xsin(7x)) + 112xcos(7x)

f'''(x) = 16(-98sin(7x) - 343xcos(7x)) + 112(-sin(7x) + 7xcos(7x))

f''''(x) = 16(-2401cos(7x) + 2401xsin(7x)) + 784xsin(7x)

At x=0, all the terms with sin(7x) vanish, and we are left with:

f(0) = 0

f'(0) = 0

f''(0) = 32

f'''(0) = -5488

f''''(0) = 0

Thus, the Maclaurin series for f(x) is:

f(x) = 32x^2 - 2744x^3 + O(x^4)

We can also find the coefficients directly by using the formula:

cn = f^(n)(0) / n!

where f^(n)(0) is the nth derivative of f(x) evaluated at x=0. Using this formula, we get:

c0 = f(0) / 0! = 0

c1 = f'(0) / 1! = 0

c2 = f''(0) / 2! = 32 / 2 = 16

c3 = f'''(0) / 3! = -5488 / 6 = -914.6667

c4 = f''''(0) / 4! = 0 / 24 = 0

Therefore, the Maclaurin series for f(x) is:

f(x) = 16x^2 - 914.6667x^3 + O(x^4)

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Answer:

answer for qn 10, 11, 12 is C, F, I, L

answer for 14, 15, 16 is A, E, G

Step-by-step explanation:

for angles larger than 90⁰ its considered obtuse

angles smaller than 90⁰ its called acute

right angles are 90⁰

The coordinates of the point located in front of the yz-plane, to the left of the xz-plane, and below the xy-plane are ( -3, 6, -1).

To determine the coordinates of a point located relative to the coordinate planes, we need to consider the given distances in each direction.

In this case, the point is located six units in front of the yz-plane, which means it has a negative x-coordinate of -6. It is also three units to the left of the xz-plane, resulting in a negative y-coordinate of -3. Lastly, the point is one unit below the xy-plane, giving it a negative z-coordinate of -1.

Combining these values, we get the coordinates of the point as (-3, 6, -1).

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A. No solution - Draw two parallel lines on the same coordinate plane. The system of equations will have no solutions.

B. Exactly one solution - Draw two lines intersecting at a single point on the same coordinate plane. The system of equations will have exactly one solution.

C. Infinitely many solutions - Draw two identical lines overlapping each other on the same coordinate plane. The system of equations will have infinitely many solutions.

To represent the different types of solutions for a system of equations, lines are drawn on the coordinate plane. For a system with no solution, two parallel lines can be drawn. This is because parallel lines never intersect and therefore cannot have a solution in common.For a system with exactly one solution, two lines that intersect at a single point can be drawn. The point of intersection represents the solution that the two equations have in common.For a system with infinitely many solutions, two identical lines can be drawn that overlap each other. This is because any point on either line will satisfy both equations, resulting in infinitely many solutions.

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The missing values in the area model to solve 10(2w + 7) are 20w and 70

From the question, we have the following parameters that can be used in our computation:

Expression = 10(2w + 7)

The area model of the expression can be represeted as

10(2w + 7) = (__ + __)

When the brackets are opened, we have

10(2w + 7) = 10 * 2w + 10 * 7 = (__ + __)

Evaluate the products

10(2w + 7) = 20w + 70 = (__ + __)

This means that the missing values in the area model are 20w and 70

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In the multiple regression equation, the symbol b represents the partial slope.

In multiple regression analysis, the goal is to examine the relationship between a dependent variable (Y) and multiple independent variables (X1, X2, X3, etc.). The multiple regression equation can be expressed as:

Y = b0 + b1*X1 + b2*X2 + b3*X3 + ...

In this equation, the symbol b is used to represent the regression coefficients or slopes associated with each independent variable. Specifically, each b coefficient represents the change in the dependent variable (Y) associated with a one-unit change in the corresponding independent variable, while holding all other independent variables constant. Therefore, b is the partial slope of the specific independent variable, indicating the direction and magnitude of the relationship between that independent variable and the dependent variable.

Option A, "partial slope," correctly describes the role of the symbol b in the multiple regression equation. The slope of X and Y (Option B) refers to the simple regression coefficient in a simple linear regression equation with only one independent variable. Option C mentions the beta slope of X and Z, which is not a standard terminology. Option D, Y-intercept, represents the value of Y when all independent variables are set to zero, and it is denoted by b0 in the multiple regression equation.

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The value of the integral is -1/4 times the integral of cos(y) over the interval [0, π], which is 0 since the cosine function is periodic with period 2π and integrates to 0 over one period.

To evaluate the integral ∫sin^3(x) cos(y) dx dy over the region [0, π/2] x [0, π], we integrate with respect to x first and then with respect to y.

∫sin^3(x) cos(y) dx dy = cos(y) ∫sin^3(x) dx dy

= cos(y) [-cos(x) + 3/4 sin(x)^4]_0^(π/2) from evaluating the integral with respect to x over [0, π/2].

= cos(y) (-1 + 3/4) = -1/4 cos(y)

Therefore, the value of the integral is -1/4 times the integral of cos(y) over the interval [0, π], which is 0 since the cosine function is periodic with period 2π and integrates to 0 over one period. Thus, the final answer is 0.

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The series ∑(k=1 to infinity) k ln(k) / (k^2 + 3) diverges.

To test for convergence or divergence, we can use the comparison test or the limit comparison test. Let's use the limit comparison test.

First, note that k ln(k) is a positive, increasing function for k > 1. Therefore, we can write:

k ln(k) / (k^2 + 3) >= ln(k) / (k^2 + 3)

Now, let's consider the series ∑(k=1 to infinity) ln(k) / (k^2 + 3). This series is also positive for k > 1.

To apply the limit comparison test, we need to find a positive series ∑b_n such that lim(k->∞) a_n / b_n = L, where L is a finite positive number. Then, if ∑b_n converges, so does ∑a_n, and if ∑b_n diverges, so does ∑a_n.

Let b_n = 1/n^2. Then, we have:

lim(k->∞) ln(k) / (k^2 + 3) / (1/k^2) = lim(k->∞) k^2 ln(k) / (k^2 + 3) = 1

Since the limit is a finite positive number, and ∑b_n = π^2/6 converges, we can conclude that ∑a_n also diverges.

Therefore, the series ∑(k=1 to infinity) k ln(k) / (k^2 + 3) diverges

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