A pool company has learned that, by pricing a newly released noodle at $2, sales will reach 20,000 noodles per day during the summer. Raising the price to $7 will cause the sales to fall to 15,000 noodles per day. [Hint: The line must pass through (2,20000) and (7,15000).]

Main Answer:In the given question, we need to find the number of students who are selling back history and math books but not business books, the number of students selling back exactly two of these three types of books and the number of students selling back at most two of these three types of books. We can solve these using a Venn diagram or the Principle of Inclusion-Exclusion.Using Principle of Inclusion-Exclusion, we can find the number of students selling back history and math books but not business books as follows:Number of students returning history books only = 19 - (9 + 5 + 3) = 2Number of students returning math books only = 19 - (9 + 5 + 3) = 2Number of students returning both math and history books but not business books = (9 + 5 + 3) - 19 = -1 (Since this value is not possible, we take it as 0)Therefore, the number of students selling back history and math books but not business books = 2 + 2 - 0 = 4.Answer in more than 100 words:Let A, B, and C be the sets of students returning math, history, and business books, respectively. We can use the information given in the question to create a Venn diagram and fill in the values as follows:From the above Venn diagram, we can find the number of students selling back exactly two of these three types of books as follows:Number of students returning only math books = 8Number of students returning only history books = 2Number of students returning only business books = 12Therefore, the number of students selling back exactly two of these three types of books = 8 + 2 + 12 = 22.To find the number of students selling back at most two of these three types of books, we need to consider all possible combinations of sets A, B, and C as follows:No set: 0 studentsExactly one set: (19-9-5-3)+(19-9-5-3)+(21-9-5-3) = 9+9+4 = 22Exactly two sets: 22 students (calculated above)All three sets: 3 studentsTherefore, the number of students selling back at most two of these three types of books = 0 + 22 + 3 = 25.Conclusion:Therefore, the number of students selling back history and math books but not business books is 4, the number of students selling back exactly two of these three types of books is 22, and the number of students selling back at most two of these three types of books is 25.

The derivative of [tex]f(x) = -5x - x^{2} at x = 9 is f'(9) = -23.[/tex]

To compute the derivative of the function f(x) = [tex]-5x - x^2[/tex] algebraically, we can use the power rule and the constant multiple rule.

Given:

[tex]f(x) = -5x - x^2}[/tex]

a = 9

Let's find the derivative f'(x):

[tex]f'(x) = d/dx (-5x) - d/dx (x^2})[/tex]

Applying the constant multiple rule, the derivative of -5x is simply -5:

[tex]f'(x) = -5 - d/dx (x^2})[/tex]

To differentiate [tex]x^2[/tex], we can use the power rule. The power rule states that for a function of the form f(x) =[tex]x^n[/tex], the derivative is given by f'(x) = [tex]nx^{n-1}[/tex]. Therefore, the derivative of [tex]x^2[/tex] is 2x:

f'(x) = -5 - 2x

Now, we can evaluate f'(x) at a = 9:

f'(9) = -5 - 2(9)

f'(9) = -5 - 18

f'(9) = -23

Therefore, the derivative of [tex]f(x) = -5x - x^2} at x = 9 is f'(9) = -23.[/tex]

Learn more about derivative at:

brainly.com/question/989103

#SPJ4

(a) To determine if {{A,D,E},{B,C},{D,F}} is a partition of set K={A,B,C,D,E,F}, we need to check two conditions:

1. Each element of K should be in exactly one subset of the partition.

2. The subsets of the partition should be disjoint.

Let's examine the subsets of the given partition:

Subset 1: {A, D, E}

Subset 2: {B, C}

Subset 3: {D, F}

Condition 1 is satisfied because each element of K appears in one and only one subset. All elements A, B, C, D, E, and F are covered.

Condition 2 is not satisfied because Subset 1 and Subset 3 have an element in common, which is D. Subsets in a partition should be disjoint, meaning they should not share any elements.

Therefore, {{A,D,E},{B,C},{D,F}} is not a partition of set K.

(b) To determine if {{3,7,8},{2,9},{1,4,5}} is a partition of set L={1,2,3,4,5,6,7,8,9}, we again need to check the two conditions for a partition.

Let's examine the subsets of the given partition:

Subset 1: {3, 7, 8}

Subset 2: {2, 9}

Subset 3: {1, 4, 5}

Condition 1 is satisfied because each element of L appears in one and only one subset. All elements 1, 2, 3, 4, 5, 6, 7, 8, and 9 are covered.

Condition 2 is satisfied because the subsets are disjoint. There are no common elements among the subsets.

Therefore, {{3,7,8},{2,9},{1,4,5}} is a partition of set L.

Learn more about subset here:

https://brainly.com/question/31739353

#SPJ11

The maximum usual value is 25.6.

The minimum usual value is 22.4.

To find the maximum and minimum usual values of normally distributed data with a mean of 24 and a standard deviation of 1.6, we can use the concept of z-scores, which tells us how many standard deviations a given value is from the mean.

The maximum usual value is one that is one standard deviation above the mean, or a z-score of 1. Using the formula for calculating z-scores, we have:

z = (x - μ) / σ

where:

x is the raw score

μ is the population mean

σ is the population standard deviation

Plugging in the values we have, we get:

1 = (x - 24) / 1.6

Solving for x, we get:

x = 25.6

Therefore, the maximum usual value is 25.6.

Similarly, the minimum usual value is one that is one standard deviation below the mean, or a z-score of -1. Using the same formula as before, we have:

-1 = (x - 24) / 1.6

Solving for x, we get:

x = 22.4

Therefore, the minimum usual value is 22.4.

Learn more about   value  from

https://brainly.com/question/24078844

#SPJ11

Therefore, there are 105 integers that satisfy the given inequalities.

To find the number of integers that satisfy the inequalities 11 < √x < 15, we need to determine the range of integers between which the square root of x falls.

First, we square both sides of the inequalities to eliminate the square root:

[tex]11^2 < x < 15^2[/tex]

Simplifying:

121 < x < 225

Now, we need to find the number of integers between 121 and 225 (inclusive). To do this, we subtract the lower limit from the upper limit and add 1:

225 - 121 + 1 = 105

To know more about integers,

https://brainly.com/question/30943098

#SPJ11

InAnother model for a growth function for a limited population is given by the Gompertz function, which is a solution of the differential equation

dP/dt cln (K/P)P where c is a constant and K is the carrying capacity The limiting value of the size of the population is \( \frac{4000}{e^{C_2 - C_1}} \).

To solve the differential equation \( \frac{dP}{dt} = c \ln\left(\frac{K}{P}\right)P \) for the given parameters, we can separate variables and integrate:

\[ \int \frac{1}{\ln\left(\frac{K}{P}\right)P} dP = \int c dt \]

Integrating the left-hand side requires a substitution. Let \( u = \ln\left(\frac{K}{P}\right) \), then \( \frac{du}{dP} = -\frac{1}{P} \). The integral becomes:

\[ -\int \frac{1}{u} du = -\ln|u| + C_1 \]

Substituting back for \( u \), we have:

\[ -\ln\left|\ln\left(\frac{K}{P}\right)\right| + C_1 = ct + C_2 \]

Rearranging and taking the exponential of both sides, we get:

\[ \ln\left(\frac{K}{P}\right) = e^{-ct - C_2 + C_1} \]

Simplifying further, we have:

\[ \frac{K}{P} = e^{-ct - C_2 + C_1} \]

Finally, solving for \( P \), we find:

\[ P(t) = \frac{K}{e^{-ct - C_2 + C_1}} \]

Now, substituting the given values \( c = 0.2 \), \( K = 4000 \), and \( P_0 = 300 \), we can compute the specific solution:

\[ P(t) = \frac{4000}{e^{-0.2t - C_2 + C_1}} \]

To compute the limiting value of the size of the population as \( t \) approaches infinity, we take the limit:

\[ \lim_{{t \to \infty}} P(t) = \lim_{{t \to \infty}} \frac{4000}{e^{-0.2t - C_2 + C_1}} = \frac{4000}{e^{C_2 - C_1}} \]

Learn more about limiting value here :-

https://brainly.com/question/29896874

#SPJ11

The proportion of bags of chips that weigh under 8 ounces or more is approximately 0.159, or 15.9%.

To find the proportion of bags of chips that weigh under 8 ounces or more, we need to calculate the cumulative probability up to the value of 8 ounces in a normal distribution with a mean of 8.1 ounces and a standard deviation of 0.1 ounces.

Using a standard normal distribution table or a statistical software, we can find the cumulative probability for the z-score corresponding to 8 ounces.

The z-score can be calculated using the formula:

z = (x - μ) / σ

where x is the value of interest (8 ounces), μ is the mean (8.1 ounces), and σ is the standard deviation (0.1 ounces).

Substituting the values:

z = (8 - 8.1) / 0.1

z = -1

Looking up the cumulative probability for a z-score of -1 in a standard normal distribution table, we find the value to be approximately 0.159.

Therefore, the proportion of bags of chips that weigh under 8 ounces or more is approximately 0.159, or 15.9%.

Learn more about  proportion of bags  from

https://brainly.com/question/1496357

#SPJ11

The graph of f(x) opens downward, the vertex is at (-5, 7), the equation of the axis of symmetry is x = -5, the vertical intercept is (0, -93), the symmetric point to the vertical intercept is (-10, -93), the domain is all real numbers, and the range is all real numbers less than or equal to 7.

a. The graph of f(x) opens downward. We can determine this by observing the coefficient of the x^2 term, which is -4 in this case. Since the coefficient is negative, the graph of the function opens downward.

b. The vertex of the graph is the point where the function reaches its minimum or maximum value. In this case, the coefficient of the x term is 0, so the x-coordinate of the vertex is -5. To find the y-coordinate, we substitute -5 into the function: f(-5) = -4(-5+5)^2 + 7 = 7. Therefore, the vertex is (-5, 7).

c. The equation of the axis of symmetry is given by the x-coordinate of the vertex. In this case, the equation is x = -5.

d. The vertical intercept is the point where the graph intersects the y-axis. To find this point, we substitute x = 0 into the function: f(0) = -4(0+5)^2 + 7 = -93. Therefore, the vertical intercept is (0, -93).

e. The symmetric point to the vertical intercept is the point that has the same y-coordinate but is reflected across the axis of symmetry. In this case, the symmetric point to (0, -93) is (-10, -93).

f. The domain of f(x) is all real numbers since there are no restrictions on the x-values. The range of f(x) is the set of all real numbers less than or equal to 7, since the graph opens downward and the vertex is at (x, 7).

To know more about properties of graph refer here:

https://brainly.com/question/30194311

#SPJ11

The answer to the given question is the intersection of set A = {2, 3, 4, 5} and set B = {4, 5, 6, 7} is {4, 5}.The intersection of two sets refers to the elements that are common to both sets. In this particular question, the intersection of set A = {2, 3, 4, 5} and set B = {4, 5, 6, 7} is the set of elements that are present in both sets.

To find the intersection of two sets, you need to compare the elements of one set to the elements of another set. If there are any elements that are present in both sets, you add them to the intersection set.

In this case, the intersection of set A and set B would be {4, 5}.This is because 4 and 5 are common to both sets, while 2 and 3 are only present in set A and 6 and 7 are only present in set B.

Therefore, the intersection of A and B is {4, 5}.Thus, the answer to the given question is the intersection of set A = {2, 3, 4, 5} and set B = {4, 5, 6, 7} is {4, 5}.

For more question on intersection

https://brainly.com/question/30915785

#SPJ8

Option (a) None of the other choices is correct is the answer.

Mean (μ) = 10600 kg Standard deviation (σ) = 960 kgThe demand is X = 10984 kg.

To find the z-score, we use the formula of z-score=z=(X-μ)/σ Substitute the given values= (10984 - 10600) / 960= 3.9333 ≈ 3.93Therefore, the z-score in a week where the demand is X = 10984 kg is 3.93 which is not given in the options.

Learn more about Standard deviation

https://brainly.com/question/29115611

#SPJ11

To obtain the graph of g(x) from the graph of f(x), we perform a horizontal translation of 3 units to the left and a vertical stretch of 4. The correct choice is B.

The transformations that can be used to obtain the graph of g from the graph of f are described below: Translation If we replace f (x) with f (x) + k, where k is a constant, the graph is translated k units upward. If we substitute f (x − h), we obtain the graph that is shifted h units to the right.

On the other hand, if we substitute f (x + h), we obtain the graph that shifted h units to the left. In this case, [tex]g(x) = 4^{(x + 3)}[/tex] and [tex]f(x) = 4^x[/tex], therefore to obtain the graph of g from the graph of f, we will translate the graph of f three units to the left.

Vertical stretch - The graph is vertically stretched by a factor of a > 1 if we replace f (x) with f (x). The graph of f(x) will be stretched vertically by a factor of 4 to obtain the graph of g(x).

Thus, if the transformation rules are applied, we can move the graph of f(x) three units to the left and stretch it vertically by a factor of 4 to obtain the graph of g(x).

So, the transformation from f(x) to g(x) is a horizontal translation of 3 units to the left and a vertical stretch of 4. Therefore, the correct choice is B.

For more questions on graph

https://brainly.com/question/19040584

#SPJ8

The mean of the 118 data points is $16.3 rounded off to one decimal place $5.47.

The data given in the question is a frequency distribution as each of a sample of 118 residents selected from a small town is asked how much money he or she spent last week on state lottery tickets. 84 of the residents responded with $0. The mean expenditure for the remaining residents was $19. The largest expenditure was $229. From this data, we can calculate the mean by using the formula:

Mean = Σx/n

where Σx represents the sum of all the observations and n represents the total number of observations in the data set.

We know that 84 residents have an expenditure of $0 and the remaining (118-84) residents have a mean expenditure of $19, let's say the total sum of the remaining residents' expenditure is X, then we can write:

X/(118-84) = $19

X = 34*19 = $646

Now, the total sum of the observations in the data set will be the sum of the expenditure of the 84 residents with $0 expenditure and the total sum of the remaining residents' expenditure.

Hence,

Σx = 84(0) + 646

Σx = $646

The total number of observations in the data set is 118.

Therefore,Mean = Σx/n

Mean = $646/118

Mean = $5.47

The mean expenditure for the whole sample is $5.47.

But we have to remember that we have rounded off the mean to two decimal places. Therefore, we need to round off the mean to one decimal place.

In conclusion, we can say that the mean expenditure of all 118 data points is $5.47.

To know more about mean visit:

brainly.com/question/30974274

#SPJ11

Finding the smallest number of patches needed to fill in every pothole on a road represented by a string is the goal of the provided issue.Here is an illustration of a Java implementation:

Java class Solution, public int solution(String S), int patches = 0, int i = 0, and int n = S.length();        as long as (i n) and (S.charAt(i) == 'x') Move to the section following the patched segment with the following code: patches++; i += 3; if otherwise i++; // Go to the next segment

       the reappearance of patches;

Reason: - We set the starting index 'i' to 0 and initialise the number of patches to 0.

- The string 'S' is iterated over till the index 'i' reaches its conclusion.

- We increase the patch count by 1 and add a patch if the current segment at index 'i' has the pothole indicated by 'x'.

learn more about issue here :

https://brainly.com/question/29869616

#SPJ11

Given that, the population is approximately 20 million. They play the game on average 5 times per day. Each game averages about 5 minutes.

Approximate estimate of how many people are playing it right now is calculated below: Number of people playing right now = 20 million x 60% x 5 times per day/24 hours x 5 minutes/60 minutes= 150 people playing right now therefore, approximately 150 people are playing the game Awesome Logic Quiz at this moment. Awesome Logic Quiz is a popular mobile game in Australia that's very addictive. It's estimated that 60% of the Australian population has the game, and they play it an average of 5 times per day. Each game averages about 5 minutes. We've calculated that approximately 150 people are playing the game right now.

Learn more about population

https://brainly.com/question/15889243

#SPJ11

The derivative of f(x) = 4x⁻¹ at x = 9 is f'(9) = -4/81. The equation of the tangent line to the graph of f at x = 9 is y - (4/9) = (-4/81)(x - 9).

To compute the derivative of the function f(x) = 4x⁻¹ at x = 9 using the limit definition, we can follow these steps:

Step 1: Write the limit definition of the derivative.

f'(a) = lim(h->0) [f(a + h) - f(a)] / h

Step 2: Substitute the given function and value into the limit definition.

f'(9) = lim(h->0) [f(9 + h) - f(9)] / h

Step 3: Evaluate f(9 + h) and f(9).

f(9 + h) = 4(9 + h)⁻¹

f(9) = 4(9)⁻¹

Step 4: Plug the values back into the limit definition.

f'(9) = lim(h->0) [4(9 + h)⁻¹ - 4(9)⁻¹] / h

Step 5: Simplify the expression.

f'(9) = lim(h->0) [4 / (9 + h) - 4 / 9] / h

Step 6: Find a common denominator.

f'(9) = lim(h->0) [(4 * 9 - 4(9 + h)) / (9(9 + h))] / h

Step 7: Simplify the numerator.

f'(9) = lim(h->0) [36 - 4(9 + h)] / (9(9 + h)h)

Step 8: Distribute and simplify.

f'(9) = lim(h->0) [36 - 36 - 4h] / (9(9 + h)h)

Step 9: Cancel out like terms.

f'(9) = lim(h->0) [-4h] / (9(9 + h)h)

Step 10: Cancel out h from the numerator and denominator.

f'(9) = lim(h->0) -4 / (9(9 + h))

Step 11: Substitute h = 0 into the expression.

f'(9) = -4 / (9(9 + 0))

Step 12: Simplify further.

f'(9) = -4 / (9(9))

f'(9) = -4 / 81

Therefore, the derivative of f(x) = 4x⁻¹ at x = 9 is f'(9) = -4/81.

To find the equation of the tangent line to the graph of f at x = 9, we can use the point-slope form of a line, where the slope is the derivative we just calculated.

The derivative f'(9) represents the slope of the tangent line. Since it is -4/81, the equation of the tangent line can be written as:

y - f(9) = f'(9)(x - 9)

Substituting f(9) and f'(9):

y - (4(9)⁻¹) = (-4/81)(x - 9)

Simplifying further:

y - (4/9) = (-4/81)(x - 9)

This is the equation of the tangent line to the graph of f at x = 9.

To know more about derivative,

https://brainly.com/question/30727025

#SPJ11

To declare a variable with a constant value that cannot be changed, you would use the "const" keyword. The correct declaration would be: const double RATE = 3.50;

In this declaration, the variable "RATE" is of type double and is assigned the value 3.50. The "const" keyword indicates that the value of RATE cannot be modified once it is assigned.

The other options provided are incorrect. "double constant RATE=3.50;" and "double const =3.50;" are syntactically incorrect as they don't specify the variable name. "constant RATE=3.50;" is also incorrect as the "constant" keyword is not recognized in most programming languages. "double const RATE = 3.50;" is incorrect as the order of "const" and "RATE" is incorrect.

Therefore, the correct way to declare a variable with a constant value that cannot be changed is by using the "const" keyword, as shown in the first option.

To know more about constant value refer to-

https://brainly.com/question/28297759

#SPJ11

Let us assume that the roots of a quadratic equation are x and y respectively.

[tex](2),x(7-x)=5=>7x - x² = 5=>x² - 7x + 5 = 0[/tex]

[tex]x² - 7x + 10 = 0[/tex]

So, two numbers that add up to -7 and multiply to 5 are -5 and -2. Then, we can factorize the above quadratic equation into.

 [tex](x-2)(x-5)=0[/tex]

The roots of the quadratic equation are x=2 and x=5.Therefore, the required quadratic equation is: Expanding the above quadratic equation we get.

[tex]x² - 7x + 10 = 0[/tex]

To know more about assume visit:

https://brainly.com/question/24282003

#SPJ11

Answer:    y    =     30x

Hence, The Equation Representing the money that MARCUS EARNS for WORKING (X)  HOURS  is:      y    =     30x

MAKE A PLAN:

We need to find the Equation that represents the money MARCUS EARNS based on the number of hours he works.

Y  represents the money that MARCUS EARNED in X HOURS

Now,   Y   =   30x

        In an Hour MARCUS makes:

        $30.00

        30  *   X

         Y  represents the money that MARCUS EARNED in X HOURS

         Y   =    30x

Hence, The Equation Representing the money that MARCUS EARNS for WORKING (X)  HOURS is:      y    =     30x

I hope this helps you!

If L is the limit of xn, for any positive ε, there exists a natural number N such that for all n ≥ N, |xn - L| < ε. This means that L + ε > xn for all n ≥ N. Therefore, L + ε is an upper bound for the set {xn : n ≥ N}, and an is the least upper bound for this set. Hence, L ≤ an.

Let xn be a sequence of real numbers that converges to L. This means that for any positive ε, there exists a natural number N such that for all n ≥ N, |xn - L| < ε.

Now consider bn = inf{xk : k ≥ n} and an = sup{xk : k ≥ n}. We want to show that bn ≤ L ≤ an for all natural numbers n.

First, let's prove that bn ≤ L. Since L is the limit of xn, for any positive ε, there exists a natural number N such that for all n ≥ N, |xn - L| < ε. This means that L - ε < xn for all n ≥ N. Therefore, L - ε is a lower bound for the set {xn : n ≥ N}, and bn is the greatest lower bound for this set. Hence, bn ≤ L.

Next, let's prove that L ≤ an. Similarly, since L is the limit of xn, for any positive ε, there exists a natural number N such that for all n ≥ N, |xn - L| < ε. This means that L + ε > xn for all n ≥ N. Therefore, L + ε is an upper bound for the set {xn : n ≥ N}, and an is the least upper bound for this set. Hence, L ≤ an.

In conclusion, if xn converges to L, then bn ≤ L ≤ an for all natural numbers n.

Learn more about natural number here : brainly.com/question/32686617

#SPJ11

The curve xy² - 4x²y + 14 = 0 is given and we need to find the equation of the tangent at (2,1) to approximate the value of y in xy² - 4x²y + 14 = 0 when x = 2.1.

Given the equation of the curve xy² - 4x²y + 14 = 0

To find the slope of the tangent at (2,1), differentiate the equation w.r.t. x,xy² - 4x²y + 14 = 0

Differentiating, we get

2xy dx - 4x² dy - 8xy dx = 0

dy/dx = [2xy - 8xy]/4x²

= -y/x

The slope of the tangent is -y/xat (2, 1), the slope is -1/2

Now use point-slope form to find the equation of the tangent line

y - y1 = m(x - x1)y - 1 = (-1/2)(x - 2)y + 1/2 x - y - 2 = 0

When x = 2.1, y - 2.1 - 1/2(y - 1) = 0

Simplifying, we get3y - 4.2 = 0y = 1.4

Therefore, the value of y in xy² - 4x²y + 14 = 0 when x = 2.1 is approximately 1.4.

To find the value of y, substitute the value of x into the equation of the curve,

xy² - 4x²y + 14 = 0

When x = 2.1,2.1y² - 4(2.1)²y + 14 = 0

Solving for y, we get

3y - 4.2 = 0y = 1.4

Therefore, the value of y in xy² - 4x²y + 14 = 0 when x = 2.1 is approximately 1.4.

Learn more about the slope of the tangent: https://brainly.com/question/28994498

#SPJ11

The smallest integer a such that the Intermediate Value Theorem guarantees that f(x) has a zero on the interval (-3, a) is a = -2.

To find the smallest integer a such that the Intermediate Value Theorem guarantees that f(x) = x^2 + 6x + 8 has a zero on the interval (-3, a), we need to determine the sign change of the function across the interval.

To check for a sign change, we evaluate f(-3) and f(a).

Substituting -3 into the function, we have f(-3) = (-3)^2 + 6(-3) + 8 = 9 - 18 + 8 = -1.

Since f(-3) is negative, we need to find the smallest positive value of a such that f(a) becomes positive.

Now, substituting a into the function, we have f(a) = a^2 + 6a + 8.

To find the smallest positive value of a for which f(a) is positive, we can factor the quadratic equation f(a) = a^2 + 6a + 8 = (a + 2)(a + 4).

Setting the factors equal to zero, we find that a + 2 = 0, and a + 4 = 0. Solving for a, we have a = -2 and a = -4.

Since we are looking for the smallest positive value of a, we take a = -2.

To learn more about Intermediate Value Theorem click here

brainly.com/question/30403106

#SPJ11

The ladder touches the building at a height of 20 feet.

In the given scenario, we have a 25-foot ladder leaning against a building, with the bottom of the ladder positioned 15 feet away from the building.

To determine how high the ladder touches the building, we can use the Pythagorean theorem.

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides.

In this case, the ladder acts as the hypotenuse, and the distance from the building to the ladder's bottom and the height where the ladder touches the building form the other two sides of the right triangle.

Let's label the height where the ladder touches the building as h. According to the Pythagorean theorem, we have:

[tex](15 feet)^2 + h^2 = (25 feet)^2[/tex]

[tex]225 + h^2 = 625[/tex]

[tex]h^2 = 625 - 225[/tex]

[tex]h^2 = 400[/tex]

Taking the square root of both sides, we find:

h = 20 feet

Therefore, the ladder touches the building at a height of 20 feet.

To state the units clearly, the height where the ladder touches the building is 20 feet.

For similar question on height.

https://brainly.com/question/28990670  

#SPJ8

Kristina made the investment of $10,500 at 11% and $18,000 at 13% in each account, after one year if the the total interest was $3,495.00.

Let x be the amount invested at 11% and y be the amount invested at 13%.

The sum of the amounts is the total amount invested, which is $28,500.

Therefore, we have:

x + y = 28,500

We are also given that the total interest earned after one year is $3,495.

We can use the simple interest formula:

I = Prt,

where I is the interest,

P is the principal,

r is the interest rate as a decimal,

and t is the time in years. For the 11% account, we have:

I₁ = 0.11x(1) = 0.11x

For the 13% account, we have:

I₂ = 0.13y(1) = 0.13y

The sum of the interests is equal to $3,495, so we have:

0.11x + 0.13y = 3,495

Multiplying the first equation by 0.11, we get:

0.11x + 0.11y = 3,135

Subtracting this equation from the second equation, we get:

0.02y = 360

Dividing both sides by 0.02, we get:

y = 18,000

Substituting this into the first equation, we get:

x + 18,000 = 28,500x = 10,500

Therefore, Kristina invested $10,500 at 11% and $18,000 at 13%.

To know more about investment refer here:

https://brainly.com/question/15105766

#SPJ11

The growth rate of the equation 8n² + nlog(n) is O(nlog(n)), indicating logarithmic growth as n increases.

To determine the growth rate of the equation 8n² + nlog(n) in Big O notation, we examine the dominant term that has the greatest impact on the overall growth as n increases.

In this equation, we have two terms: 8n² and nlog(n). Among these, the term with the highest growth rate is nlog(n), as it involves logarithmic growth. The term 8n² represents quadratic growth, which is surpassed by the logarithmic term as n becomes large.

Therefore, the growth rate for this equation can be expressed as O(nlog(n)). This indicates that the overall growth of the function is proportional to n multiplied by the logarithm of n. As n increases, the runtime or complexity of the function will increase at a rate dictated by the logarithmic growth of n.

In summary, the growth rate of the equation 8n² + nlog(n) is O(nlog(n)), signifying logarithmic growth as n becomes large.

To know more about Big O notation, refer to the link below:

https://brainly.com/question/32495582#

#SPJ11

The irrational numbers between 1 and √2 are 1.247......, 1.367.... and  1.1509....

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

1 and square root 2

Rewrite as

1 and √2

When evaluated, we have

1 and 1.41421356.....

The irrational numbers between the numbers are numbers that cannot be expressed as fractions

Some of these numbers are

1.247......

1.367....

1.1509....

Read more about irrational numbers at

https://brainly.com/question/20400557

#SPJ1

Problem 2:

Variable: Height

Type: Quantitative

Population: Residents of a specific cityVariable: Political affiliation (e.g., Democrat, Republican, Independent)Population: Registered voters in a state

Problem 4:

Variable: Temperature

Type: Quantitative

Population: City residents during the summer season

Variable: Level of education (e.g., High School, Bachelor's degree, Master's degree)

Type: Qualitative Population: Employees at a particular company Variable: Income Type: Quantitative Population: Residents of a specific county

Variable: Favorite color (e.g., Red, Blue, Green)Type: Qualitative Population: Students in a particular school Variable: Number of hours spent watching TV per day

Type: Quantitativ  Population: Children aged 5-12 in a specific neighborhood Problem 9:Variable: Blood type (e.g., A, B, AB, O) Type: Qualitative Population: Patients in a hospital Variable: Sales revenueType: Quantitative Population: Companies in a specific industry

Learn more abou Quantitative here

https://brainly.com/question/32236127

#SPJ11

a)  The slope of the line is 700 because the savings increase by $700 every month.

b)  The savings of Alex after six months will be $4,200.

c) Alex need to save for 12 months in order to be able to buy a car worth $9,200.

a) Linear equation that models Alex's balance in his savings account

The linear equation that models Alex's balance in his savings account can be given asy = 700x + 800  Where x is the number of months and y is the total savings amount. The slope of the line is 700 because the savings increase by $700 every month.

b) Savings after 6 months of Alex currently has $800, so after six months, he will have saved:800 + 6 * 700 = 4,200

Hence, his savings after six months will be $4,200.

c) The number of months he will need to save for a car worth $9,200

If Alex wants to buy a car worth $9,200, we need to set the savings equal to $9,200 and solve for x in the linear equation given above.

The equation can be written as:  9,200 = 700x + 800

Subtracting 800 from both sides, we get: 8,400 = 700x

Dividing both sides by 700, we get: x = 12

Thus, he will need to save for 12 months in order to be able to buy a car worth $9,200.

know more about about slope here

https://brainly.com/question/3605446#

#SPJ11

The area of the parallelogram formed by the given vertices (-3, -1), (0, 6), (5, -5), and (8, 2) is 68 square units.

To calculate the area of a parallelogram using the given vertices, we can use the method of finding the magnitude of the cross product of two vectors formed by the adjacent sides of the parallelogram. By taking the vectors AB and AC, which are formed by subtracting the coordinates of the vertices, we obtain AB = (3, 7) and AC = (8, -4).

To find the area, we take the cross product of these vectors, which is obtained by multiplying the corresponding components and taking the difference: AB × AC = (3 * (-4)) - (7 * 8) = -12 - 56 = -68. However, since we are interested in the magnitude or absolute value of the cross product, we take |AB × AC| = |-68| = 68.

Thus, the area of the parallelogram formed by the given vertices is 68 square units. The magnitude of the cross product gives us the area because it represents the product of the lengths of the two sides of the parallelogram and the sine of the angle between them. In this case, the result is positive, indicating a non-zero area.

To know more about parallelogram refer here:

https://brainly.com/question/28284595

#SPJ11

The given differential equation is nonlinear and first order.

To determine linearity, we check if the terms involving the dependent variable (in this case, W) and its derivatives are linear. In the given equation, the term "W sqrt(1+W^2)" is nonlinear because of the square root operation. A linear term would involve W or its derivative without any nonlinear functions applied to it.

The order of a differential equation refers to the highest order of the derivative present in the equation. In this case, we have the first derivative (dW/dx), so the order  of the differential equation is first order.

Learn more about Derivates here

https://brainly.com/question/32645495

#SPJ11

To solve the differential equation [tex]xydx - (x + 2y)^2dy = 0[/tex] using the substitution[tex]x = vy,[/tex] we need to express [tex]dx[/tex] and [tex]dy[/tex] in terms of dv and dy. Taking the derivative of [tex]x = vy[/tex] with respect to y, we have:

[tex]dx = vdy + ydv[/tex]

Substituting this expression for dx and x = vy into the original differential equation, we get:

[tex](vy)(vdy + ydv) - (vy + 2y)^2dy = 0[/tex]

Expanding and simplifying, we have:

[tex]v^2y^2dy + vy^2dv + vydy - (v^2y^2 + 4vy^2 + 4y^2)dy = 0[/tex]

Combining like terms, we obtain:

[tex]v^2y^2dy + vy^2dv + vydy - v^2y^2dy - 4vy^2dy - 4y^2dy = 0[/tex]

Canceling out the common terms, we are left with:

[tex]vy^2dv - 4vy^2dy = 0[/tex]

Dividing through by [tex]vy^2,[/tex] we obtain:

[tex]dv - 4dy = 0[/tex]

So, the transformed differential equation in simplest form is [tex]dv - 4dy = 0,[/tex]which corresponds to choice (D).

Learn more differential equation here:

https://brainly.com/question/32645495

#SPJ11