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A jewelry artisan has determined that her revenue, y, each day at a craft fair is at most -0. 532 + 30. 5, where x represents the number


of necklaces she sells during the day. To make a profit


, her revenue must be greater than her costs, 25 + 150.


Write a system of inequalities to represent the values of x and y where the artisan makes a profit. Then complete the statements.


The point (30,230) is


The point (10,300) is


of this system


of this system


Submit


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The asymptotes of the hyperbola with equation[tex](x - 2)^2/81 (y + 2)^2/4 = 1[/tex]are [tex]y = +(x - 2) + 2.[/tex]

The given hyperbola has a horizontal transverse axis and its center is at (2, -2). The standard form of a hyperbola with a horizontal transverse axis is[tex](x - h)^2/a^2 - (y - k)^2/b^2 = 1[/tex] , where (h, k) is the center of the hyperbola, a is the distance from the center to each vertex along the transverse axis, and b is the distance from the center to each vertex along the conjugate axis.

Comparing the given equation to the standard form, we can see that

[tex]a^2[/tex]= 81, so a = 9, and [tex]b^2[/tex] = 4, so b = 2. Therefore, the distance between the center and each vertex along the transverse axis is 9, and the distance between the center and each vertex along the conjugate axis is 2.

The asymptotes of a hyperbola with a horizontal transverse axis have equations y = +/- (b/a)(x - h) + k. Substituting the values of a, b, h, and k, we get:

y = +(2/9)(x - 2) - 2 and y = -(2/9)(x - 2) - 2

Therefore, the equations of the asymptotes for the given hyperbola are

y = +(x - 2)/9 - 2 and y = -(x - 2)/9 - 2.

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Answer:

First choice

Step-by-step explanation:

This is much like slicing a stick of butter....you want the cut face to have the same dimensions as the current face  5.5 x 4  inches

The distribution that X follows in this scenario is A. X ~ Expo(1/16), which means that the waiting time until you see Peter the Anteater follows an exponential distribution with a rate parameter of 1/16.

This can be determined by considering the characteristics of an exponential distribution, which models the waiting time for an event to occur given a constant rate. In this case, the event is seeing Peter the Anteater, and the rate is the average time it takes for him to appear, which is given as 16 minutes.

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Answer:

Step-by-step explanation:

Use the parent function, then shift as necessary

Parent function:

y= log₅ x     >put in exponential form

[tex]5^{y} =x[/tex]  

Since our variables are a bit backwards work backwards

For y = 0    x=1

For y=1   x= 5

For y= 2  x=10  and so on and so forth

Put into T table

x   |    y

1    |    0

5   |   1

10  | 2

This is your parent:   There is a stretch of 2 and a shift of 1 to right for your function

so mulitply y by 2 and move over to right by 1

x   |    y

1  +1   |    0 *2

5 +1   |     1*2

10+ 1   |      2*2

x   |    y

2   |    0

6   |   2

11  |  4

Your asymptote is x=1 because you shifted right 1

Two samples are paired if the sample values are paired.

Paired samples are a type of dependent samples where each observation in one sample is uniquely paired or matched with an observation in the other sample. The pairing is usually based on a natural association, such as measuring the same variable on the same subject before and after a treatment, or measuring two variables on the same subject at the same time. Paired samples are often analyzed using methods such as paired t-test or Wilcoxon signed-rank test, which take into account the dependency between the samples. Pairing can also help to reduce variability and increase statistical power in the analysis.

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A value of theta in the first quadrant that satisfies the equation is approximately 0.4548 radians or 26.1 degrees.

Starting with the equation:

6sin(2θ) = 5

Divide both sides by 6:

sin(2θ) = 5/6

We know that sine is positive in the first and second quadrants. Since we are looking for a value of theta in the first quadrant, we can use the inverse sine function to solve for 2θ:

2θ = sin⁻¹(5/6)

Using a calculator, we get:

2θ ≈ 0.9095 radians

Dividing by 2, we get:

θ ≈ 0.4548 radians

To convert to degrees, we can use the conversion formula:

1 radian = 180/π degrees

So:

θ ≈ 0.4548 radians = (180/π) * 0.4548 degrees ≈ 26.1 degrees

Therefore, a value of theta in the first quadrant that satisfies the equation is approximately 0.4548 radians or 26.1 degrees.

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Answer:

167925

Step-by-step explanation:

Liabilities are things that he owes.

Home value is an asset (not a liability).

Mortgage is a liability (he owes!).

Credit card balance is a liability (he has to pay that much).

Owned equip is owned (asset).

Car value is an asset.

Investments are assets.

The kitchen loan is a liability (he has to pay that back).

So add up those liabilities: Mortgage + credit card + kitchen loan

149367+6283+12275 = 167925

The volume of the cylinder is [tex]5725.28\ cm^3[/tex].

According to the question:

The diameter of the cylinder [tex]d = 18\ cm[/tex]

Therefore radius [tex]r[/tex] = [tex]9\ cm[/tex]

Height [tex]h = 2.5\times 9 = 22.5\ cm[/tex]

To find:

The volume of the cylinder

We know that the volume of a cylinder is:

[tex]V = \pi r^2h[/tex]

substitute the given values into this equation and take [tex]\pi = 3.1415[/tex], we get:

[tex]V = 3.1415\times 9^2\times 22.5\ cm^3[/tex]

[tex]V = 5725.28\ cm^3[/tex]

Therefore, The volume of the cylinder is [tex]5725.28\ cm^3[/tex].

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True, the slope measures the rate of change in the y-values with respect to the x-values. In other words, it indicates how much the y-value changes when the x-value changes by a certain amount. When referring to a linear equation in the form y = mx + b, the slope is represented by the coefficient m.

If the slope is positive, it means that as the x-value increases by a certain amount, the y-value also increases. Conversely, if the slope is negative, it means that as the x-value increases, the y-value decreases. The slope can be calculated using the formula (change in y) / (change in x), which can be written as (y2 - y1) / (x2 - x1) for any two points (x1, y1) and (x2, y2) on the line.In your specific question, the slope would indeed represent how much the y-value changes when the x-value changes by 2 units of the variable being measured. Therefore, if you know the slope and you have a starting point, you can calculate the corresponding y-value after the x-value has changed by 2 units. This concept is important in various fields, such as mathematics, physics, and economics, where the relationships between variables are often represented using linear equations with slopes.

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It is indeed possible to find non-empty families f and g such that the intersection of f and g, denoted as (f ∩ g), is not equal to the intersection of f and the intersection of g, denoted as (f) ∩ (g).

Let's consider the following example to prove this statement. Assume we have two families of sets: f = {{1, 2, 3}, {2, 3, 4}} and g = {{3, 4, 5}, {4, 5, 6}}. In this case, the intersection of f and g is f ∩ g = {{3}}.

Now, let's find the intersection of f and the intersection of g. The intersection of g, denoted as (g), is {3, 4, 5, 6}. Therefore, (f) ∩ (g) = {{1, 2, 3}, {2, 3, 4}} ∩ {3, 4, 5, 6} = {}.

As we can see, f ∩ g = {{3}} is not equal to (f) ∩ (g) = {}, which confirms that there exist non-empty families f and g for which the intersection of f and g is not equal to the intersection of f and the intersection of g.

This example illustrates that the intersections of families of sets do not necessarily distribute over each other, leading to distinct results in different orderings of intersections.

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Answer: An equation of the plane can be written in the form Ax + By + Cz = D, where A, B, and C are the coefficients of the variables x, y, and z, respectively, and D is a constant. We can use the point-normal form of the equation of a plane to find the coefficients A, B, and C.

The point-normal form of the equation of a plane is:

A(x - x1) + B(y - y1) + C(z - z1) = 0

where (x1, y1, z1) is the point on the plane and (A, B, C) is the normal vector to the plane.

We can substitute the values of the point and normal vector into this equation:

8(x - 3) + (y - 9) - (z - 8) = 0

Simplifying and rearranging, we get:

8x + y - z = 47

Therefore, the equation of the plane through the point (3, 9, 8) with normal vector 8i + j - k is:

8x + y - z = 47

The equation of a plane in three-dimensional space can be written in the form ax + by + cz = d, where (a, b, c) is a normal vector to the plane, and d is a constant.

We are given that the plane passes through the point (3, 9, 8) and has a normal vector of 8i + j - k. Therefore, a = 8, b = 1, c = -1, and the equation of the plane is:

8x + y - z = d

To find the value of d, we substitute the coordinates of the given point into the equation:

8(3) + 1(9) - 1(8) = d

24 = d

Thus, the equation of the plane is:

8x + y - z = 24

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False.

The 85th percentile of a distribution cannot be less than zero. The percentile is a measure that indicates the percentage of data points below a given value. Therefore, the 85th percentile refers to the point in the distribution where 85% of the data falls below that point. Since zero is the lowest possible value in any distribution, it is impossible for the 85th percentile to be less than zero. It is important to note that percentiles are relative measures and can only be interpreted in the context of the distribution they are derived from.
The statement "the 85th percentile of a distribution can sometimes be less than zero" is a. true. In a distribution, the percentile represents the value below which a given percentage of the data falls. In this case, the 85th percentile indicates the value below which 85% of the data points lie. If the distribution is negatively skewed, with most of its data points concentrated on the left side and towards negative values, the 85th percentile can indeed be less than zero. It ultimately depends on the specific distribution and the range of values it contains.

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The 2x2 change-of-basis matrix PS2+S1 is [1/3 -1/3; 1/6 1/3].

The component vector of f(x) with respect to S2 is (35/6, 31/6).

The vector space V consists of all linear combinations of 1 + x². The ordered basis S = {1 + 2x, x} and S2 = {1 + 2x + x², 2 + x + 2x²} are given for V. To find the change-of-basis matrix PS2+S1, we need to express the basis vectors of S in terms of S2, and then form a matrix using the coefficients of the resulting linear combinations.

After performing the necessary calculations, we get PS2+S1 = [1/3 -1/3; 1/6 1/3].

The component vector of f(x) with respect to Sj is obtained by expressing f(x) as a linear combination of the basis vectors in Sj, and then finding the coefficients of the resulting linear combination.

For S2,

we have f(x) = 5 + 3x + 5x² = (35/6)(1 + 2x + x²) + (31/6)(2 + x + 2x²), which gives us the component vector of f(x) with respect to S2 as (35/6, 31/6).

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The equation (x-5)² + (y+1)² = 256 represents a circle with center T(5,-1) and a radius of 16 units. Therefore, the correct answer is B.

The standard form of the equation of a circle with center (h,k) and radius r is given by:

(x-h)² + (y-k)² = r²

In this case, the center is T(5,-1) and the radius is 16 units. Substituting these values into the standard form, we get:

(x-5)² + (y+1)² = 16²

This simplifies to:

(x-5)² + (y+1)² = 256

Therefore, the correct answer is B.

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True. The correct formula for the multiplication of two complex numbers z and w is zw = (xu - yv) + i(xv + yu).

In complex analysis, multiplication of two complex numbers is defined by the formula zw = (xu - yv) + i(xv + yu), where z = x + iy and w = u + iv.

To understand why this formula is true, let's expand the product zw using the given expressions for z and w:

zw = (x + iy)(u + iv).

Using the distributive property, we can expand this expression:

zw = x(u + iv) + iy(u + iv).

Now, apply the distributive property again to expand each term:

zw = xu + x(iv) + iyu + i(i)v.

Using the fact that i^2 = -1, we can simplify the expression further:

zw = xu + i^2v + iyu + iv.

Since i^2 = -1, we have:

zw = xu - v + iyu + iv.

Finally, rearranging the terms, we get:

zw = (xu - yv) + i(xv + yu).

Therefore, the formula zw = (xu - yv) + i(xv + yu) holds true, which confirms that the statement "zw = (xu - yu) + i(xu + yu)" is false.

In summary, the correct formula for the multiplication of two complex numbers z and w is zw = (xu - yv) + i(xv + yu). This formula takes into account both the real and imaginary parts of the complex numbers and is essential for performing calculations involving complex numbers.

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The likelihood that the value resulting from the spin is no greater than two is 0.4, which is equivalent to 40%.

According to the distribution table, there are a total of ten slots on the wheel, and their corresponding values are as follows: 0, 1, 2, 5, and 10. In order to compute the likelihood of obtaining a value that is at most 2, we must first establish the number of possibilities that are desirable and then divide that figure by the entire number of outcomes that are feasible.

In this particular scenario, the outcomes that are desirable are the numbers 0 and 1, which indicates that there are three distinct possibilities that fulfil the requirement. Due to the fact that there are 10 spots on the wheel, the total number of events that could occur is 10.

Therefore, the probability of achieving a result that is no greater than two is three out of ten, which can be streamlined down to 0.3 or thirty percent. When a participant spins the wheel, there is a chance that they will win a value of 0, 1, or 2 at a rate of thirty percent of the time.

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The test statistic is x02 = (n - 1)s2/σ2 = 19s2/5. The approximate p-value for this test is 0.025.

a. For x02 = 25.2 and n = 20, the test statistic is:

x02 = (n - 1)s2/σ2 = 19s2/5

where s2 is the sample variance. Under the null hypothesis, x02 follows a chi-squared distribution with n - 1 = 19 degrees of freedom. The p-value is the probability of observing a test statistic as extreme or more extreme than the observed one, assuming the null hypothesis is true. Using a chi-squared distribution table or calculator, we find that the probability of observing a chi-squared value of 19s2/5 or less with 19 degrees of freedom is approximately 0.05. Therefore, the approximate p-value for this test is 0.05.

b. For x02 = 15.2 and n = 12, the test statistic is:

x02 = (n - 1)s2/σ2 = 11s2/5

where s2 is the sample variance. Under the null hypothesis, x02 follows a chi-squared distribution with n - 1 = 11 degrees of freedom. Using a chi-squared distribution table or calculator, we find that the probability of observing a chi-squared value of 11s2/5 or less with 11 degrees of freedom is approximately 0.10. Therefore, the approximate p-value for this test is 0.10.

c. For x02 = 4.2 and n = 15, the test statistic is:

x02 = (n - 1)s2/σ2 = 14s2/5

where s2 is the sample variance. Under the null hypothesis, x02 follows a chi-squared distribution with n - 1 = 14 degrees of freedom. Using a chi-squared distribution table or calculator, we find that the probability of observing a chi-squared value of 14s2/5 or less with 14 degrees of freedom is approximately 0.025. Therefore, the approximate p-value for this test is 0.025.

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The area of the figure is 197 cm².

We have,

From the figure,

We can make three shapes.

Rectangle 1:

Area = 9 x 3 = 27 cm²

Rectangle 2:

Area = (9 + 3) x (17 - 6) = 12 x 11 = 132 cm²

Trapezium:

Area = 1/2 x (parallel sides sum) x height

= 1/2 x (12 + 7) x (15 + 6 - 17)

= 1/2 x 19 x 4

= 19 x 2

= 38 cm²

Now,

The area of the figure.

= 27 + 132 + 38

= 197 cm²

Thus,

The area of the figure is 197 cm².

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The expected price of Tricki Corp, when it begins trading ex-rights, is $90.

We have,

When a stock goes ex-rights, the right to buy additional shares at a discounted price is no longer available to new investors.

Therefore, the value of the right is subtracted from the current stock price.

In this case,

To purchase one share of Tricki Corp, an investor would need to buy 10 rights at a cost of $10 each, for a total cost of $100.

With the subscription price of $90, the total cost of one share is $190.

Before going ex-rights, the stock price is $100.

After going ex-rights, the value of the right is $190 - $100 = $90.

The expected price of Tricki Corp, when it begins trading ex-rights.

= $100 - $90

= $10.

The new stock price will be $100 - $10 = $90.

Thus,

The expected price of Tricki Corp, when it begins trading ex-rights, is $90.

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The parcel of land described as ne¼, nw¼, se¼, sec.24, t2n, r7e, 6th p.m. would be a total of 40 acres.

This is because each ¼ section is equal to 40 acres, and this description includes 4 ¼ sections.

In the Public Land Survey System (PLSS), land is divided into 6-mile-square townships. Each township is then divided into 36 sections, each section being a square mile or 640 acres.

Each section can be further divided into quarters, and each quarter section is equal to 160 acres.

Therefore, a description of ne¼, nw¼, se¼, sec.24, t2n, r7e, 6th p.m. refers to the northeast quarter of the northwest quarter of the southeast quarter of section 24, township 2 north, range 7 east, 6th principal meridian. Since this description includes 4 quarter sections, the total acreage would be 40 acres.

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The absolute magnitude of the reduction in the variation of y when x is introduced into the regression model represents the amount by which the variability of y decreases due to the inclusion of x.

The absolute magnitude of the reduction in the variation of y when x is introduced into the regression model can be determined by calculating the difference in the variability of y before and after the inclusion of x. Here are the steps to explain it:

Calculate the variation of y (also known as the total sum of squares, SST) before introducing x into the regression model.

Fit a regression model with both y and x as variables and calculate the residuals (the differences between the observed y values and the predicted y values).

Calculate the sum of squares of the residuals (also known as the residual sum of squares, SSE) after introducing x into the model.

Calculate the absolute magnitude of the reduction in the variation of y by subtracting SSE from SST.

Reduction in variation = SST - SSE

This value represents the amount by which the variability of y decreases when x is introduced into the model. It indicates how much of the total variation in y can be explained by the inclusion of x in the regression model.

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Finding the derivatives of x and y with respect to t

We need to find the values of t for which the given parametric equations for x and y intersect.

We need to find the values of t for which the given parametric equations for x and y intersect.

To do that, we first find the derivatives of x and y with respect to t.

dx/dt = 2t - 90t^4

dy/dt = (2t^3 - 28t^2)/7

Setting the derivatives equal to zero and solving for t

Next, we set each derivative equal to zero and solve for t.

2t - 90t^4 = 0

t(2 - 90t^3) = 0

t = 0 or t = (2/90)^(1/3) ≈ 0.382

(2t^3 - 28t^2)/7 = 0

t(2t - 28)/7 = 0

t = 0 or t = 14/2 = 7

Therefore, the points on the curve that have horizontal or vertical tangent lines are (0,0), (7,49/2), and approximately (1.176,-9.724).

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The eigenvector corresponding to the eigenvalue λ = 4 is: v = [-3, -1, 1]

To determine if λ = 4 is an eigenvalue of the matrix

2 2 -4

3 -1 4

0 1 5

we need to check if there exists a non-zero vector v such that Av = λv, where A is the given matrix.

We have the equation:

A - λI = 0

where I is the identity matrix and 0 is the zero matrix. Let's substitute the values:

A - 4I =

2 2 -4

3 -1 4

0 1 5

4 0 0

0 4 0

0 0 4

Performing the subtraction, we get:

-2 2 -4

3 -5 4

0 1 1

Now, we set this resulting matrix equal to the zero matrix:

-2v₁ + 2v₂ - 4v₃ = 0

3v₁ - 5v₂ + 4v₃ = 0

v₂ + v₃ = 0

Simplifying the system of equations, we have:

-2v₁ + 2v₂ - 4v₃ = 0

3v₁ - 5v₂ + 4v₃ = 0

v₂ = -v₃

We can choose v₃ as a free variable and set v₃ = 1, which gives us v₂ = -1. Then, substituting these values back into the equations, we find:

-2v₁ + 2(-1) - 4(1) = 0

3v₁ - 5(-1) + 4(1) = 0

Simplifying these equations, we get:

-2v₁ - 6 = 0

3v₁ + 9 = 0

Solving these equations, we find v₁ = -3 and v₂ = -1.

Therefore, the eigenvector corresponding to the eigenvalue λ = 4 is:

v = [-3, -1, 1]

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The above given figures can be name in two different ways as follows:

13.)line WRS or SRW

14.) line XHQ or QHX

15.) line LA or AL

16.) Line UJC or CJU

17.) Line LK or KL

18.) line PXL or LXP

The names of a figure are gotten from the points on the figure. For example in figure 13, The names of the figure are WRS and SRW.

There are three points on the given figure, and these points are: point W, point R and point S, where Point R is between W and S.

This means that, when naming the figure, alphabet R must be at the middle while alphabets W and S can be at either sides of R.

Figure 13.)The possible names of the figure are: WRS and SRW.

Figure 14.)The possible names of the figure are: XHQ or QHX

Figure 15.)The possible names of the figure are:LA or AL

Figure 16.)The possible names of the figure are:UJC or CJU

Figure 17.)The possible names of the figure are:LK or KL

Figure 18.)The possible names of the figure are:PXL or LXP.

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If two methods agree perfectly in a method comparison study, the slope equals 1.0 and the y-intercept equals 0.0. Therefore, option (b) is the correct answer.

In a method comparison study, the goal is to compare the agreement between two different measurement methods or instruments. The relationship between the measurements obtained from the two methods can be described by a linear equation of the form y = mx + b, where y represents the measurements from one method, x represents the measurements from the other method, m represents the slope, and b represents the y-intercept.

When the two methods agree perfectly, it means that there is a one-to-one relationship between the measurements obtained from each method. In other words, for every x value, the corresponding y value is the same. This indicates that the slope of the line connecting the measurements is 1.0, reflecting a direct proportional relationship.

Additionally, when the two methods agree perfectly, there is no systematic difference or offset between the measurements. This means that the line connecting the measurements intersects the y-axis at 0.0, indicating that the y-intercept is 0.0.

Therefore, in a perfect agreement scenario, the slope equals 1.0 and the y-intercept equals 0.0, which corresponds to option (b).

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The curl of the vector field

curl f = (-8y sin(z)/z)i - (5ex sin(z) - 4x tan^-1(x/z)/z)j + (5exy cos(z) + 4y/x)k and the the divergence of the vector field div f = 5y sin(z) + 4/x for the given vector field. f(x, y, z) = 5exy sin(z)j 4y tan−1(x/z)k.

To find the curl of the vector field f(x, y, z) = 5exy sin(z)j + 4y tan−1(x/z)k, we use the formula:

curl f = ∇ × f

where ∇ is the del operator.

Using the del operator, we have:

∇ = i(∂/∂x) + j(∂/∂y) + k(∂/∂z)

Taking the curl of the vector field f, we have:

curl f = ∇ × f

= i(det |j k| ∂/∂y ∂/∂z + |k i| ∂/∂z ∂/∂x + |i j| ∂/∂x ∂/∂y) (5exy sin(z)j + 4y tan−1(x/z)k)

= i((-4y sin(z)/z) - (4y sin(z)/z)) - j((5ex sin(z)) - (4x tan^-1(x/z)/z)) + k((5exy cos(z)) + (4y/x))

Therefore, the curl of the vector field is:

curl f = (-8y sin(z)/z)i - (5ex sin(z) - 4x tan^-1(x/z)/z)j + (5exy cos(z) + 4y/x)k

To find the divergence of the vector field f(x, y, z) = 5exy sin(z)j + 4y tan−1(x/z)k, we use the formula:

div f = ∇ · f

where ∇ is the del operator.

Using the del operator, we have:

∇ = i(∂/∂x) + j(∂/∂y) + k(∂/∂z)

Taking the divergence of the vector field f, we have:

div f = ∇ · f

= (∂/∂x)(5exy sin(z)) + (∂/∂y)(4y tan−1(x/z)) + (∂/∂z)(0)

= (5y sin(z)) + (4/x) + 0

= 5y sin(z) + 4/x

Therefore, the divergence of the vector field is:

div f = 5y sin(z) + 4/x

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The eigenvalues of the given matrix are λ₁ = 1/10 and λ₂ = 21/10, and their associated eigenvectors are [3, 1] and [1, -2], respectively.

To find the eigenvalues and eigenvectors of the matrix, we need to solve the equation (A - λI)v = 0, where A is the given matrix, λ is the eigenvalue, I is the identity matrix, and v is the eigenvector.

For the given matrix |2 3 ||0 9/10 |, subtracting λI gives the matrix |2 - λ 3 ||0 9/10 - λ |. Setting this matrix equal to zero and solving the system of equations yields the eigenvalues.

By solving (2 - λ)(9/10 - λ) - 3*0 = 0, we obtain the eigenvalues λ₁ = 1/10 and λ₂ = 21/10.

To find the eigenvectors, we substitute each eigenvalue back into the equation (A - λI)v = 0 and solve for v.

For λ₁ = 1/10, solving (2 - (1/10))x + 3y = 0 and 3x + ((9/10) - (1/10))y = 0 gives the eigenvector [3, 1].

Similarly, for λ₂ = 21/10, solving (2 - (21/10))x + 3y = 0 and 3x + ((9/10) - (21/10))y = 0 gives the eigenvector [1, -2].

In summary, the eigenvalues of the given matrix are λ₁ = 1/10 and λ₂ = 21/10, and their associated eigenvectors are [3, 1] and [1, -2], respectively

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1) The statement of Lin is correct.

2) (a) When scale factor, k = 9, area of the new triangle = 8100 square inches

(b) When k = 3/4, area of the new triangle = 56.25 square inches.

Given that,

A triangle has area 100 square inches.

It's dilated by a factor of k = 0.25.

When the triangle is dilated by a scale factor of k, then, each of the base and height is dilated by the scale factor of k.

So new area of the triangle after the dilation with the original triangle having base = b and height = h is,

Area of new triangle = 1/2 (kb)(kh) = k² (1/2 bh) = k² × Area of original triangle

Here original area = 100 square inches.

k = 0.25

New area = (0.25)² 100 = 6.25 square inches

So the correct statement is that of Lin.

Mai may found the new area by just multiplying the scale factor with 100, instead of taking the square of the scale factor. That is why she got 25 square inches as the new area.

2) (a) When k = 9,

Area of the new triangle = 9² (100) = 8100 square inches

(b) When k = 3/4

Area of the new triangle = (3/4)² (100) = 56.25 square inches

Hence the areas are found.

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