what did I do wrong?​

Answer: 1

Step-by-step explanation:

Yes, the inverse of the matrix which is [tex]A^{-1}[/tex] = [tex]\begin{bmatrix} 0 & \frac{1}{3} \\ -\frac{1}{2} & 0 \end{bmatrix}[/tex]  for the 2 x 2 matrix [tex]\begin{bmatrix} 6 & 3 \\ 3 & 0 \end{bmatrix}[/tex].

To find the inverse of a matrix, we need to check if it is invertible first, which means its determinant should not be equal to zero.

Let's calculate the determinant of the matrix,

A: [tex]\begin{bmatrix} 6 & 3 \\ 3 & 0 \end{bmatrix}[/tex]

det(A) = (6 x 0) - (3 x 3) = -9

Since the determinant is not equal to zero, we can conclude that matrix A is invertible.

To find the inverse of matrix A, we can use the following formula:

[tex]A^{-1}[/tex] = (1/det(A)) x adj(A)

where adj(A) is the adjugate of A and can be calculated by taking the transpose of the matrix of cofactors of A.

The matrix of cofactors of A is:

[tex]\begin{bmatrix} 0 & -3 \\ -3 & 6 \end{bmatrix}[/tex]

Taking the transpose of the matrix of cofactors, we get:

[tex]\begin{bmatrix} 0 & -3 \\ 3 & 6 \end{bmatrix}[/tex]

So, the adjugate of A is:

adj(A) = [tex]\begin{bmatrix} 0 & -3 \\ 3 & 6 \end{bmatrix}[/tex]

Now, we can find the inverse of A:

[tex]A^{-1}[/tex] = (1/-9) x adj(A)

= (-1/9) x [tex]\begin{bmatrix} 0 & -3 \\ 3 & 6 \end{bmatrix}[/tex]

= [tex]\begin{bmatrix} 0 & \frac{1}{3} \\ -\frac{1}{2} & 0 \end{bmatrix}[/tex]

Therefore, the inverse of matrix A is:

[tex]A^{-1}[/tex] = [tex]\begin{bmatrix} 0 & \frac{1}{3} \\ -\frac{1}{2} & 0 \end{bmatrix}[/tex]

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The standard deviation is approximately 1.50.

a) The random variable (X) is the number of left-handed people among the 25 randomly selected people.

b) The given numeric values with the correct symbols are:
n = 25 (sample size)
p = 0.1 (probability of being left-handed)

c) To compute the mean (µ), use the formula µ = n * p:
µ = 25 * 0.1 = 2.5

The correct interpretation of the mean is that on average, 2.5 people are expected to be left-handed in a sample of 25 randomly selected people.

d) To compute the standard deviation (σ), use the formula σ = √(n * p * (1 - p)):
σ = √(25 * 0.1 * (1 - 0.1))
σ = √(25 * 0.1 * 0.9)
σ = √(2.25)
σ ≈ 1.50 (rounded to 2 decimal places)

So, the standard deviation is approximately 1.50.

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You should use auxiliary information in estimation under the following conditions:

1. When the auxiliary information is strongly correlated with the variable of interest: If there's a strong relationship between the auxiliary variable and the variable you're trying to estimate, incorporating the auxiliary information can lead to more accurate estimates.

2. When the auxiliary information is readily available and reliable: It's important that the auxiliary information is easy to obtain and trustworthy, so that it can be used to improve the estimation process without introducing errors or biases.

3. When the primary data source is limited or costly to obtain: In cases where collecting data on the variable of interest is difficult, time-consuming, or expensive, using auxiliary information can be an efficient way to improve the estimation.

4. When the goal is to improve the precision of estimates: Auxiliary information can be used to reduce the variance of estimates, resulting in more precise and accurate results.

In summary, you should use auxiliary information in estimation when it is strongly correlated with the variable of interest, readily available and reliable, when primary data is limited or costly to obtain, and when the goal is to improve the precision of estimates.

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The percentage of individuals surveyed that are older than 14 but younger than 20 would be = 24%.

The histogram is a graphical representation that can be used to represent results in bars of equal widths with different heights.

The total number of people that are older than 14 but younger than 20 = 18

The total number of attendees = 20+18+25+12 = 75

The percentage of 75 that is 18 is calculated as follows;

= 18/75 × 100/1

= 1800/75

= 24%

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The solution of the equation using Cramer's rule is x = -6 and y = 2.

The solution of the equation can be obtained by using Cramer's rule as shown below;

2x + y = 14

5x - 2y = 26

The determinant is calculated as;

    2   1

     5  - 2

Δ= -4 - 5

= - 9

The y determinant is calculated as;

            2  14

            5  26

Δy= 52 - 70

= -18

The x determinant is calculated as;

1    14

-2  26

Δx = 26 + 28

= 54

The value of x and y is calculated as;

x = Δx/Δ

y = Δy/Δ

x = 54/-9 = -6

y = -18/-9 = 2

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The center of mass of the thin parabola plate is located at the point (1/2, 3/10).

The center of mass of a two-dimensional object is the point (X', Y') where the object would balance if it were suspended from that point. The coordinates X' and Y' are given by the formulas:

X' = Mx / M

Y' = My / M

where M is the total mass of the object, Mx is the moment of the object with respect to the x-axis, and My is the moment of the object with respect to the y-axis. The moments are defined as integrals of the density over the region:

Mx = ∫∫ xρ(x,y) dA

My = ∫∫ yρ(x,y) dA

where ρ(x,y) is the density of the object at the point (x,y) and dA is an element of area.

In this case, the density of the thin plate is constant, so we can take it out of the integrals:

Mx = ∫∫ x dA = ∫∫ x dx dy

My = ∫∫ y dA = ∫∫ y dx dy

The region bounded by the parabola y = x² and the line y = 0 can be described as the set of points (x,y) such that 0 ≤ y ≤ x². Therefore, we can set up the integrals as follows:

Mx = ∫∫ x dx dy = ∫0^1 ∫0ˣ x dx dy = ∫0^1 (1/2)x² dy = 1/6

My = ∫∫ y dx dy = ∫0^1 ∫0ˣ y dx dy = ∫0^1 (1/2)x⁴ dy = 1/10

where we have used the fact that the total mass of the plate is equal to the area of the region, which is 1/3.

Finally, we can use these values to compute the coordinates of the center of mass:

X' = Mx / M = (1/6) / (1/3) = 1/2

Y' = My / M = (1/10) / (1/3) = 3/10

Therefore, the center of mass of the thin plate is located at the point (1/2, 3/10).

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In the 2021–22 flu season, 51.4% of people aged 6 months had had a flu shot, which is 0.7 percentage points less than the 52.1% coverage seen in the preceding season (Table 1).

Here, we have,

The influenza vaccination rate is calculated as the proportion of adults 65 and older who receive an annual influenza shot to the entire population of people over 65. This metric represents the proportion of people aged 65 and over who have had their annual flu shot.

The flu vaccine should not be given to infants under the age of six months. Anyone who has serious, life-threatening allergies to every substance shouldn't receive the flu vaccination (other than egg proteins). Gelatin, antibiotics, and other substances might be present in this.

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complete question:

During a flu vaccine shortage in the united states, it was believed that 45 percent of vaccine-eligible people received flu vaccine. the results of a survey given to a random sample of 2,350 vaccine-eligible people indicated that 978 of the 2,350 people had received flu vaccine.

The total amount that Alfie spent at Whoa foods is: $88.59

Yes, his cookout keep him within the 20% Spending Guideline for food this month.

He is under by 13.56%

The total amount that Alfie spent at Whoa foods will be gotten by summing up all the amounts of each item to get:

$5.77 + $7.29 + $7.99 + $21.68 + $14.9 + $7.48 + $6.98 + $7.02 + $9.48

= $88.59

He makes a net monthly income of $1375.

Thus:

Percentage spent on food = 88.59/1375 * 100% = 6.44%

Since there is a max of 20% from guidelines to be spent on the food, then he is under by 20% - 6.44% = 13.56%

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The United States population (in millions) between 1970 and 2010 can be modeled [tex]p(x) = 203.12e^{0.011x }[/tex], the population of Midwest changing in 1990 and in 2010 with 0.201 millions per decade and 0.213 million per decade respectively.

A population is a defined collected persons or anything that can be recognized by at least one characteristics for the purposes of data collection and data analysis in statistics and other fields of mathematics. Now, we have population (in millions) of the United States between 1970 and 2010 and it is modeled by the function [tex]p(x) = 203.12e^{0.011x }[/tex] million people where, x is number of decades after 1970.

The percentage of people in the United States who live in the Midwest between 1970 and 2010 it is modeled by [tex]m(x) = 0.002x² − 0.213x + 27.84 \\ [/tex] percent where, x is the number of decades since 1970. So, the population of Midwest will be equal to [tex]N(x)= p(x)× \frac{m(x)}{100}[/tex]

[tex] p(x) = 203.12e^{0.011x} (\frac{ 0.002x² − 0.213x + 27.84}{100} ) \\ [/tex]

[tex]= 203.12e^{0.011x }(0.00002x² − 0.00213x + 0.2784) \\ [/tex]

The rate of change of population of the Midwest x decades after 1970 will be equal to the derivative of the function N(x). So, [tex]N'(x) \frac{ d(203.12e^{0.011x} (0.00002x²− 0.00213x + 0.2784))}{dx} \\ [/tex]

[tex]= 0.0000447 e^{0.011x} x² + 0.0033657 e^{0.011x} x +0.1893981 e^{0.011x } \\ [/tex]

In 1990, the number of decades is equal to 2. So, x=2, so [tex]N'(2) = 0.0000447 e^{0.011 \times 2} \: 2² + 0.0033657 e^{0.011×2} ×2 +0.1893981 e^{0.011×2 } \\ [/tex] = 0.201

Now, in 2010, the number of decades is 4.So, x=4, [tex]N'(4) = 0.0000447 e^{0.011 \times 4} \: 4² + 0.0033657 e^{0.011×4} ×4 +0.1893981 e^{0.011×4 } \\ [/tex]

= 0.213

Hence, the population is changing at 0.213 million per decade in 2010.

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The taller of the two boys is Ben if Marcus is 5 7 /24 feet tall and Ben is 5 13/ 16 feet tall.

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

This means that

Marcus = 5 7 /24 feet tall

Ben = 5 13/ 16 feet tall.

Express the heights as decimals

So, we have

Marcus = 5.292 feet tall

Ben = 5.8125 feet tall.

When the above values are compared, we have

5.8125 feet tall > 5.292 feet tall

Hence, the taller of the two boys is Ben

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Answer: B

Step-by-step explanation:

Im in highschool common sense

Answer:

5/16

Step-by-step explanation:

1/8 f 2/5 hr = 1/8 *5/2 = 5/16 fence per hour

The solution is, the value of x is, x = 15.

Corresponding sides have the same ratio:

 UV/PR = TV/QR

 (x +6)/14 = (x -3)/8

 4(x +6) = 7(x -3) . . . . . . multiply by 56

 4x +24 = 7x -21 . . . . . . eliminate parentheses

 45 = 3x . . . . . . . . . . . add 21-4x

 15 = x . . . . . . . . . . . .divide by 3

Alternate solution

The long-side : short-side ratios for the two triangles are ...

 14 : 8 = (x +6) : (x -3)

If we look at the differences between the ratio numbers we see ...

 14 -8 = 6

 (x +6) -(x -3) = 9

That is, the numbers in the second ratio must be 9/6 = 3/2 times the numbers in the first ratio. In other words, ...

 x -3 = (3/2)(8) = 12

 x = 15

Check: x +6 = 3/2(14) ; 15 +6 = 21

The solution is, the value of x is, x = 15.

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complete question:

question is given in the picture.

Watershed should offer the promotion to the top 70 customers to maximize their profit from the intervention campaign.

To determine the optimal number of customers to offer the promotion to, Watershed should start by offering it to customers with the highest estimated unsubscribe probability and work their way down until the promotion budget is exhausted. This approach will maximize the chances of persuading customers who are most likely to unsubscribe.

Let's assume that Watershed has a budget of $1000 to spend on promotions. This means they can offer the promotion to a maximum of 100 customers (1000/10).

To calculate the expected profit, we need to consider the probability of a customer unsubscribing, the probability of the promotion persuading them to remain a customer, and the value of retaining a customer and offering a promotion.

If a customer unsubscribes and is not persuaded to remain, the cost to Watershed is $10. If they unsubscribe but are persuaded to stay, the value to Watershed is $50 ($60-$10). If they don't unsubscribe, the cost is $0.

Using the formula given, we can calculate the profit for different values of n (the number of customers offered the promotion):

n = 10:
Profit = 10 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $460

n = 20:
Profit = 20 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $780

n = 30:
Profit = 30 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $990

n = 40:
Profit = 40 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1090

n = 50:
Profit = 50 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1150

n = 60:
Profit = 60 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1180

n = 70:
Profit = 70 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1190

n = 80:
Profit = 80 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1180

n = 90:
Profit = 90 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1150

n = 100:
Profit = 100 * (0.6 * 50 + 0.4 * (-10)) + 0 * (-10) = $1100

From the calculations above, we can see that the maximum profit of $1190 occurs when the promotion is offered to 70 customers. Beyond this point, the cost of offering the promotion to less likely churners outweighs the benefit of retaining those customers.

Therefore, Watershed should offer the promotion to the top 70 customers to maximize their profit from the intervention campaign.

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A step-by-step explanation for the given problem is:

1. You want to find the Pareto optimal solution for the given problem with the objective functions 2x + 3y and 25 - 5y, subject to the constraint x, y ≥ 0.

2. To perform Pareto optimization, you need to find the solutions where neither of the objective functions can be improved without worsening the other.

3. First, determine the Pareto frontier. To do this, you can follow these steps:
  a. Plot the objective functions on a graph.
  b. Identify the points where improving one function leads to worsening the other function. These points will form the Pareto frontier.

4. To find the Pareto optimal solution(s), consider the points along the Pareto frontier and compare the objective functions' values.

In this case, since there are no explicit constraints other than x, y ≥ 0, the Pareto optimal solution will depend on the specific context or preference between the two objective functions. If you have more specific information on the preferences, please provide it, and I'd be happy to help you find the optimal solution.

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The values of p1, p2, n1, and n2 are not provided in the question, so we cannot calculate the specific test statistic, p-value, or construct the confidence interval without that information.

To determine the null and alternative hypotheses for testing the significance of a difference between two population proportions, we need to consider the given information.

In this case, the sample sizes and the number of successes in each sample are provided. Let's denote the sample proportions as p1 and p2, which can be calculated as p1 = X1/n1 and p2 = X2/n2, where X1 and X2 represent the number of successes in each sample, and n1 and n2 represent the respective sample sizes.

The null and alternative hypotheses can be stated as follows:

Null Hypothesis (H0): π1 = π2 (The population proportions are equal)

Alternative Hypothesis (H1): π1 ≠ π2 (The population proportions are not equal)

Therefore, the correct answer is:

B. H0: π1 = π2; H1: π1 ≠ π2

To calculate the test statistic (ZSTAT) and the p-value, we can use the following formulas:

ZSTAT = (p1 - p2) / √[(p1(1 - p1) / n1) + (p2(1 - p2) / n2)]

To find the p-value, we need to compare the absolute value of ZSTAT to the critical value(s) based on the significance level. Since the significance level is not provided, we cannot determine the exact p-value without that information.

Regarding the conclusion, we compare the p-value to the significance level (α) to make a decision. If the p-value is less than α, we reject the null hypothesis; otherwise, we fail to reject the null hypothesis.

To construct the 99% confidence interval estimate, we can use the formula:

p1 - p2 ± Zα/2 * √[(p1(1 - p1) / n1) + (p2(1 - p2) / n2)]

Here, Zα/2 represents the critical value corresponding to a 99% confidence level, which is obtained from the standard normal distribution.

Unfortunately, the values of p1, p2, n1, and n2 are not provided in the question, so we cannot calculate the specific test statistic, p-value, or construct the confidence interval without that information.

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The gardener used 40.5 gallons of gasoline in his lawn mowers in the one month.

Let's say the amount of gasoline used in the lawn mowers is x gallons.

Then, the rest of the gasoline (61.5 - x) would have been used for other purposes.

Since the total amount of gasoline used is 61.5 gallons, we can set up an equation:

x + (61.5 - x) = 61.5

Simplifying this equation, we get:

x + 61.5 - x = 61.5

Combining like terms, we get:

61.5 = 61.5

This equation is true, so we know that our assumption that x is the amount of gasoline used in the lawn mowers is correct.

Therefore, the gardener used x = 40.5 gallons of gasoline in his lawn mowers in the one month.

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The area of the blue shaded figure will be 47.9 cm².

Given that;

In the figure,

A = 3 cm

B = 5 cm

Since, The area of a circle = πr²

So, For radius of small circle with radius 3 cm,

Area = πr²

Area = 3.14 × 3²

Area = 3.14 × 9

Area = 30.6 cm²

Hence, Area of small circle = 30.6 cm²

And, Area of the big circle with radius 5 cm,

Area = 3.14 × 5²

Area = 3.14 × 25

Area = 78.5 cm²

Hence, Area of big circle with radius 5 cm = 78.5 cm²

So, The area of blue shaded circle = 78.5 - 30.6

= 47.9 cm²

Thus, the area of the blue shaded figure will be 47.9 cm².

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Model 2 is better for the given data set as it has a lower error rate on the training data while having the same error rate as Model 1 on the testing data.

In predictive modeling, the goal is to create a model that can accurately predict outcomes on new data. To do this, a common approach is to divide the available data into two sets: a training set used to train the model and a testing set used to evaluate its performance.

In this scenario, Model 1 has a lower accuracy on the training set (35%) compared to Model 2 (5%). This suggests that Model 2 is better at capturing the underlying patterns in the data. However, when evaluated on the testing set, both models have the same error rate of 40%.

Therefore, we can conclude that Model 2 is better for this particular data set because it has a better performance on the training data, which is an indicator of its ability to generalize well to new data. On the other hand, Model 1 is likely overfitting the training data and may not perform as well on new data.

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The expected value of the ratio (W5 - W4)/W4 is 4.

We know that the inter-arrival times between customers are exponentially distributed with a mean of 12 minutes. Let's use this information to solve the given problems:

The arrival time of the third customer is given by W3 = S1 + S2 + S3, and the arrival time of the fifth customer is given by W5 = S1 + S2 + S3 + S4 + S5. Therefore, Q = W3/W5 = (S1 + S2 + S3)/(S1 + S2 + S3 + S4 + S5).

We can use the fact that the sum of exponential random variables with the same rate parameter is a gamma random variable with shape parameter equal to the number of exponential random variables and rate parameter equal to the rate parameter of each exponential random variable. Therefore, S1 + S2 + S3 is a gamma random variable with shape parameter 3 and rate parameter 1/12, and S1 + S2 + S3 + S4 + S5 is a gamma random variable with shape parameter 5 and rate parameter 1/12.

Hence, Q is a ratio of two gamma random variables with known shape and rate parameters. We can use the properties of the gamma distribution to find the expectation of Q as:

E[Q] = E[(S1 + S2 + S3)/(S1 + S2 + S3 + S4 + S5)]

= E[(1/Gamma(3, 1/12))/(1/Gamma(5, 1/12))]

= E[(Gamma(5, 1/12)/Gamma(3, 1/12))]

= (5/3) * (1/3)

= 5/9

Therefore, the expected value of the ratio Q is 5/9.

Using similar reasoning as in part 1, we can write (W5/W3) as (S1 + S2 + S3 + S4 + S5)/(S1 + S2 + S3), which is a ratio of two gamma random variables with known shape and rate parameters. Therefore, we can find the expected value of this ratio as:

E[W5/W3] = E[(S1 + S2 + S3 + S4 + S5)/(S1 + S2 + S3)]

= E[(1/Gamma(5, 1/12))/(1/Gamma(3, 1/12))]

= E[(Gamma(3, 1/12)/Gamma(5, 1/12))]

= (3/5) * (1/3)

= 1/5

Therefore, the expected value of the ratio W5/W3 is 1/5.

Using the same approach, we can write (W5 - W4)/W4 as (S5 - S4)/(S1 + S2 + S3 + S4). This is a ratio of two gamma random variables with known shape and rate parameters. Therefore, we can find the expected value of this ratio as:

E[(W5 - W4)/W4] = E[(S5 - S4)/(S1 + S2 + S3 + S4)]

= E[(1/Gamma(1, 1/12))/(1/Gamma(4, 1/12))]

= E[(Gamma(4, 1/12)/Gamma(1, 1/12))]

= 4

Therefore, the expected value of the ratio (W5 - W4)/W4 is 4.

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To solve this inequality, we need to find the values of x that make the expression (x-5)^2(4x+3)(x-4) less than or equal to zero.

We can start by finding the critical values of x, which are the values that make the expression equal to zero. These critical values are x=5, x=-3/4, and x=4.

Next, we can test the intervals between these critical values to see if the expression is positive or negative in each interval. We can use test points within each interval to determine the sign of the expression.

For example, if we choose x=-1 (which is between -3/4 and 5), we can evaluate the expression to get:
(-1-5)^2(4(-1)+3)(-1-4) = (-6)^2(-1)(-5) = 180

Since 180 is positive, we know that the expression is positive for all values of x in the interval (-3/4,5).

Using similar tests for the intervals (-infinity,-3/4), (-3/4,4), and (4,infinity), we can create a sign chart for the expression:

|---|---|+++|---|0--+|---|+++|---|
   -   3/4   4   5

From the sign chart, we can see that the expression is less than or equal to zero when x is in the intervals [-3/4,4] and {5}.

Therefore, the solution set in interval notation is:
[-3/4,4] U {5}

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To find the future value of this investment, we can use the formula:
FV = P(1 + r/n)^(nt)
Where:
- FV is the future value
- P is the principal (or starting amount)
- r is the nominal annual interest rate (as a decimal)
- n is the frequency of conversion per year
- t is the time (in years)

Plugging in the given values, we get:
FV = 9400(1 + 0.031/2)^(2*9)
FV = 9400(1.0155)^18
FV = 9400(1.367576)
FV = 12848.92
Therefore, the future value of the investment is $12,848.92 (rounded to the nearest cent).

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The total revenue function, given the marginal revenue function MR = 300 - 13q² + 16q³, is:

R(q) = 300q - (13/3)q³ + 4q⁴ + 28⅔

The process of determining the total revenue function requires us to integrate the marginal revenue function with respect to the quantity q. The given marginal revenue function is:

MR = 300 - 13q² + 16q³.

Applying integration of MR, we obtain the total revenue function, R(q) by integrating each term separately as follows:

R(q) = ∫300 dq - ∫13q² dq + ∫16q³ dq

R(q) = 300q - (13/3)q³ + (16/4)q⁴ + C

Which when simplified becomes:

R(q) = 300q - (13/3)q³ + 4q⁴ + C  

To find the constant value C for a case where the total revenue generated through one unit sale (q=1) is $3,316, we substitute these values into the above function expression and then solve for C. Consequently, C was found to be equal to $29-(1/3).

The total revenue function, given the marginal revenue function MR = 300 - 13q² + 16q³, is:

R(q) = 300q - (13/3)q³ + 4q⁴ + 28⅔

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Haha I remember this back in 7th grade good times the answer is y=1/3x+

Given the measures of the angle, the measure of angle A is 109 degrees

We have,

A supplementary angles are angles that add up to 180 degrees. For example 100 and 80 degrees are supplementary angles.

The first step is to determine the value of x:

(4x + 3) + (8x - 27) = 180

12x - 24 = 180

12x = 180 + 24

12x = 204

x = 17

so, we get,

A = 8(17) - 27

  = 109 degrees

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complete question:

∠A and \angle B∠B are supplementary angles. If m\angle A=(8x-27)^{\circ}∠A=(8x−27)

∘

and m\angle B=(4x+3)^{\circ}∠B=(4x+3)

∘

, then find the measure of \angle A∠A.

A shape is a triangle.Let q: A shape has four sides. The option that is true if the shape is a rectangle is D.) Q-->P

It should be noted that because a rectangle has four sides, q holds true for rectangles. However, because a rectangle is not a triangle, p is untrue.

As a result, for a rectangle, the assertion "Q implies P" or "if a shape has four sides, then it is a triangle" is untrue. As a result, option D is the correct answer, "Q implies P."

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Considering f. X -> Y is a function. If we say that f is "one-to-one", this means that for every x in X, there is at most one y in Y such that f(x) - y. The correct answer is option d.

For every x in X, there is at most one y in Y such that f(x) = y. In a one-to-one function, every element in the domain X is mapped to a unique element in the codomain Y, and no two elements in X are mapped to the same element in Y.

Therefore, the correct answer is option d. For every x in X, there is at most one y in Y such that f(x) - y.

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