You are making a 3 foot by 3 foot coffee table with a glass top surrounded by a cherry border of uniform width. The cherry border is included in the 3 x 3 measurements. You have 5 square feet of cherry border. What should the width of the border be?

The 5% discount is 8.10, Namas divide 42 between the percentage follow me and give me crown.

A discount is a reduction in the price of a product or service offered to customers. It is a common marketing strategy used by businesses to attract customers and increase sales. Discounts can be offered in various forms, such as percentage off, dollar off, or buy-one-get-one-free deals.

Discounts are often used to clear out old inventory, promote new products or services, and to reward customer loyalty. They can be temporary or ongoing, and the amount of the discount can vary depending on the product, service, or promotion. Customers benefit from discounts as they can purchase products or services at a lower price, saving them money. Businesses benefit from discounts as they can increase sales volume, clear out inventory, and attract new customers.

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Complete Question:-

Consider the discount indicated in each table and calculate the different discount percentages for the same item.

Using the ratio, we solve and get, Ben needs 0.8 litres of red paint, 0.64 litres of yellow paint, and 0.06 litres of white paint to make 1.5 litres of orange paint.

To make 1.5 litres of orange paint, Ben needs to mix the red, yellow, and white paint in the ratio of 20 : 16 : 1.5.

To calculate the amount of each color needed, you first need to find the total number of parts in the ratio.

The total number of parts is 20 + 16 + 1.5 = 37.5.

Next, you can calculate the amount of each color needed by dividing 1.5 litres by the total number of parts in the ratio, and then multiplying by the respective parts for each color.

So, the amount of red paint needed is:

(1.5/37.5) x 20 = 0.8 litres

The amount of yellow paint needed is:

(1.5/37.5) x 16 = 0.64 litres

And the amount of white paint needed is:

(1.5/37.5) x 1.5 = 0.06 litres

Therefore, Ben needs 0.8 litres of red paint, 0.64 litres of yellow paint, and 0.06 litres of white paint to make 1.5 litres of orange paint.

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The correct answer is C.

The cost of membership is fixed at $50 per year, and the cost of purchasing games is $60 each. If you purchase up to 6 games a year, the cost of each purchase will be $60, and the total cost of membership and games will be $50 + ($60 x number of games purchased).

The function that relates the number of games purchased to the total cost is:

Total cost = 50 + 60(number of games purchased)

Now, let's consider the options provided:

A. Domain: All real numbers

Range: All real numbers

This is not a valid option since the domain and range are not restricted to the given context.

B. Domain: {50, 110, 170, 230, 280, 340}

Range: {0, 1, 2, 3, 4, 5, 6}

This option does not represent the relationship between the number of games purchased and the total cost correctly.

C. Domain: {0, 1, 2, 3, 4, 5, 6}

Range: {50, 110, 170, 230, 290, 350, 410}

This option correctly represents the relationship between the number of games purchased and the total cost. The domain represents the number of games purchased (up to 6), and the range represents the total cost (membership fee + cost of games).

D. Domain: {0, 1, 2, 3, 4, 5, 6}

Range: {60, 160, 210, 270, 320, 380}

This option represents the cost of games purchased only, and does not include the cost of membership.

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Entonces, concluimos que las papas cuestan 4 pesos por kilogramo y el arroz cuesta 9 pesos por kilogramo.

Para resolver este problema, necesitamos plantear un sistema de ecuaciones lineales con dos incógnitas: el precio por kilogramo de papas y el precio por kilogramo de arroz. Podemos escribir:

12p + 6r = 102

9p + 13r = 153

Donde p es el precio por kilogramo de papas y r es el precio por kilogramo de arroz. Podemos resolver este sistema de ecuaciones usando el método de eliminación. Multiplicando la primera ecuación por 13 y la segunda ecuación por -6, obtenemos:

156p + 78r = 1326

-54p - 78r = -918

Sumando estas ecuaciones, obtenemos: 102p = 408

Dividiendo ambos lados por 102, encontramos que p = 4. Por lo tanto, el precio por kilogramo de papas es de 4 pesos.

Para encontrar el precio por kilogramo de arroz, podemos sustituir p = 4 en una de las ecuaciones originales y resolver para r. Por ejemplo, usando la primera ecuación:

12(4) + 6r = 102

48 + 6r = 102

6r = 54

r = 9

Por lo tanto, el precio por kilogramo de arroz es de 9 pesos.

Entonces, concluimos que las papas cuestan 4 pesos por kilogramo y el arroz cuesta 9 pesos por kilogramo.

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Therefore, we need 3/4 of a quart of grape juice to mix with 3 3/4 quarts of sparkling water.

In mathematics, a fraction represents a part of a whole or a ratio between two numbers. It consists of a numerator and a denominator, separated by a horizontal or diagonal line. The numerator is the number above the line and the denominator is the number below the line. The numerator and denominator can be any real numbers, including integers, decimals, or even other fractions.

Here,

The punch recipe requires a ratio of 1 1/2 quarts of sparkling water to 3/4 of a quart of grape juice. To determine how much grape juice is needed to mix with 3 3/4 quarts of sparkling water, we can set up a proportion:

1 1/2 quarts of sparkling water : 3/4 quart of grape juice = 3 3/4 quarts of sparkling water : x

To solve for x, we can cross-multiply and simplify:

(1 1/2) / (3/4) = (15/4) / (3/4)

= 15/3

= 5

3 3/4 * 1 / 5 = 15/20

= 3/4

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The volume of the original candy bar box can be found by using the formula for the volume of a triangular prism, which is V = (1/2)bh times the height. Since the base of the triangular prism has sides of 1.5 inches, we can use this to calculate the base area, which is (1/2)(1.5)(1.5) = 1.125 square inches.

The height of the original box is 8 inches, so the volume can be calculated as V = (1.125)(8) = 9 cubic inches.

For the new candy bar box, the length of each side of the triangular base is doubled to 3 inches, while the length of the prism is halved to 4 inches. Using the same formula for the volume of a triangular prism, the base area is now (1/2)(3)(3) = 4.5 square inches. The height of the new box is 4 inches, so the volume can be calculated as V = (4.5)(4) = 18 cubic inches.

Therefore, the value that represents the approximate volume of the new candy bar box is 18 cubic inches.

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There are 56 servings in a 28 pound bag of dog food.

We have the information from the question is:

Fei Yen dog eats 8 ounces of dog food each day.

Fei Yen bought a 28 pound of dog food.

To find the how many 8 ounces servings are in a 28 pound bag of dog food?

Each day Fei yen's dog eat dog food = 8 ounces

Fei yen bought a 28 pound bag of dog food.

Now, Firstly convert the pounds into ounces.

We know that:

1 pound = 16 ounces

Then, 28 pounds = 28 × 16 = 448 ounces

The number of 8 ounces servings are in a 28 pound bag of dog food:

=> [tex]\frac{448}{8} =56[/tex]

Hence, there are 56 servings in a 28 pound bag of dog food.

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We can show you all the work needed to calculate the angle measures

Hi! I'd be happy to help you find the measure of the listed angles, but I need more information.

Please provide the specific angles you'd like me to find the measure for, and any relevant information about the shape or context they're in.

Once I have that information, I can show you all the work needed to calculate the angle measures.

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Answer: 24 unit

Step-by-step explanation:

The given equation 4x - y = 18 and -4x + y = -18 has b. infinitely many solutions.

To determine how many solutions there are for the system of equations 4x - y = 18 and -4x + y = -18, follow these steps:

Step 1: Notice that the second equation is just the negative of the first equation:
4x - y = 18
(-1)(4x - y) = (-1)(18)
-4x + y = -18

Step 2: Since the second equation is just the negative of the first, the two equations are dependent and represent the same line.

Step 3: When two equations represent the same line, there are infinitely many points where they intersect, as they overlap completely.

So, the answer is: b. infinitely many solutions.

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a. The correlation between temperature and yield is 0.63, between stirring rate and yield is 0.05, and between temperature and stirring rate is -0.01.

b. The data suggest that increasing temperature causes yield to increase, but confounding variables cannot be ruled out.

c. The data do not provide strong evidence that increasing stirring rate causes yield to increase, and confounding variables cannot be ruled out.

a. To compute the correlation between temperature and yield, stirring rate and yield, and temperature and stirring rate, we can use the Pearson correlation coefficient.

The correlation between temperature and yield is 0.61, indicating a moderate positive correlation. The correlation between stirring rate and yield is 0.02, indicating a weak positive correlation. The correlation between temperature and stirring rate is -0.43, indicating a moderate negative correlation.

b. The correlation between temperature and yield suggests that increasing the temperature may lead to an increase in yield. However, we cannot conclude that this relationship is causal as there may be other factors (e.g., stirring rate) that are confounding the relationship. To establish a causal relationship, we would need to conduct a controlled experiment where we manipulate temperature while keeping other factors constant.

c. The correlation between stirring rate and yield is weak, and it is difficult to draw strong conclusions from this relationship. It is possible that the relationship is due to confounding factors such as temperature or other unmeasured variables. Further experimentation is needed to establish a causal relationship between stirring rate and yield.

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The volume of the rectangular square prism cage is 12,000 cubic inches.

Let the dimensions of the rectangular square prism cage be l x w x h, where l = w = 10 inches (since it's a square prism), and h is the height of the basketballs when stacked on top of each other. We can find the value of h using the given information as follows:

h = 5 basketballs x 48 3/4 inches/basketball = 243 3/4 inches

Therefore, the volume of the cage can be calculated as:

Volume = l x w x h = 10 in x 10 in x 243 3/4 in = 12,000 cubic inches.

Hence, the volume of the cage is 12,000 cubic inches.

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The solutions to the equation are x= -9 and x = 6

From the information given, we have that;

|x2 + 9x| = 6x + 54

To solve the quadratic equation, collect the like terms, we have;

x² + 9x - 6x = 54

subtract the terms

x² + 3x = 54

Put in standard form

x² + 3x - 54 = 0

Find the pair factors of -54 that add up to give 3 and substitute the values

x² + 9x - 6x - 54 = 0

group in pairs

(x² + 9x) - (6x - 54) = 0

factorize the expressions

x(x + 9) - 6(x + 9) = 0

Then, we have;

x- 6 = 0

x = 6

x + 9 = 0

x = -9

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The patient must be dispensed 45 tablets for a 30-day supply.

To determine how many 500 mg tablets must be dispensed for a 30-day supply given that a patient needs to take 0.5 g po  and 0.25 g po before sleeping, follow these steps:

1. Convert grams to milligrams:
0.5 g = 500 mg (morning dose)
0.25 g = 250 mg (evening dose)

2. Calculate the total daily dosage:
500 mg (morning) + 250 mg (evening) = 750 mg per day

3. Calculate the number of 500 mg tablets needed per day:
750 mg / 500 mg = 1.5 tablets per day

4. Calculate the number of tablets needed for a 30-day supply:
1.5 tablets per day * 30 days = 45 tablets

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Answer: A voting system

Step-by-step explanation:

If the entrance of the tunnel is modeled by y = -1/18x^2 + 2x - 2 then the height of the tunnel is 16 feet.

The entrance of a tunnel can be modeled by the equation y = -1/18x^2 + 2x - 2, where x and y are measured in feet. To find the height of the tunnel, follow these steps:

1. Determine the vertex of the parabola, which represents the highest point (or the height) of the tunnel.
2. The vertex can be found using the formula: x_vertex = -b / (2a), where a and b are the coefficients in the quadratic equation y = ax^2 + bx + c.

In this case, a = -1/18 and b = 2. So:

x_vertex = -2 / (2 * -1/18) = -2 / (-1/9) = 18

3. Now that we have the x-coordinate of the vertex, we can find the y-coordinate (height) by plugging the x_vertex value into the equation:

y = -1/18(18^2) + 2(18) - 2

4. Calculate the value of y:

y = -1/18(324) + 36 - 2 = -18 + 36 - 2 = 16

So, the height of the tunnel is 16 feet.

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The value of w in the expression is 10.2

The expression is given as, we are required to calculate the value of w

4(-4.6 +w)= 22.24

the first step is to open the bracket to calculate the value of x, multiply 4 with the value in the bracket

-18.4 + 4w= 22.24

collect the like terms between both sides by separating the numbers that have alphabets included in it

4w= 22.24 + 18.4

4w= 40.8

Divide by the coefficient of w which is 4

4w/4= 40.8/4

w= 40.8/4

w= 10.2

Hence the value of w in the expression is 10.2

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The area of the semi-circular window in Sandra's dining room by rounding to nearest tenth is approximately 100.5 square inches.

To find the area of a semi-circle, we need to first calculate the area of a full circle and then divide it by 2. The formula for the area of a circle is

A = π * r²,  where A is the area and r is the radius.

Rounding to the nearest tenth, the area of the window in the shape of semi-circle in Sandra's dining room is approximately 100.5 square inches.

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The most appropriate domain of the function is 0 ≤ x ≤ 22. This is because Alex can only walk from his home to the store within a maximum of 22 minutes, and the distance he walks can only be modeled within that time frame.

It is given that the function f(x) = 2.5x, which models the distance Alex walks in x minutes after leaving his house to go to the store. It takes him 22 minutes to walk from his home to the store. The most appropriate domain of the function is the range of x values that make sense in this context.

Step 1: Identify the minimum and maximum values for x.
In this case, the minimum value for x is when Alex starts walking, which is 0 minutes. The maximum value for x is when he reaches the store, which is 22 minutes.

Step 2: Express the domain as an interval.
The domain of the function can be written as an interval from the minimum to the maximum value, including both endpoints. Therefore, the domain is [0, 22].

Therefore, the most appropriate domain of the function f(x) = 2.5x, which models the distance Alex walks in x minutes after leaving his house to go to the store, is [0, 22].

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The inequality that represents the possible values for the number of hours babysitting, b, and the number of hours walking dogs, d, that Kaylee can work in a given week is: 10b + 9d ≥ 170

To understand why this is the correct inequality, we can start by using algebra to represent Kaylee's total earnings for a given week as a function of the number of hours she spends babysitting, b, and the number of hours she spends walking dogs, d. We can use the following equation:

Total earnings = 10b + 9d

We know that Kaylee must earn a minimum of $170 in a given week. We can use this information to create an inequality by setting the total earnings equal to or greater than $170:

10b + 9d ≥ 170

This inequality tells us that Kaylee must earn at least $170 in total, and that the amount she earns from babysitting, 10b, plus the amount she earns from walking dogs, 9d, must be greater than or equal to $170. We can solve this inequality for either b or d to find the possible combinations of hours that would satisfy it. For example, if we solve for b, we get:

b ≥ (170 - 9d)/10

This inequality tells us that the number of hours spent babysitting must be greater than or equal to the expression (170 - 9d)/10, which is a function of the number of hours spent walking dogs, d. Similarly, if we solve for d, we get:

d ≥ (170 - 10b)/9

This inequality tells us that the number of hours spent walking dogs must be greater than or equal to the expression (170 - 10b)/9, which is a function of the number of hours spent babysitting, b. In either case, the inequality tells us that there are many possible combinations of hours that would satisfy the requirement that Kaylee earns at least $170 in a given week.

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The summation of the horizontal components is -629.76 N, and the summation of the vertical components is 363.68 N. These values were calculated using trigonometry to find the horizontal and vertical components of each force and then adding up the components separately.

To find the summation of the horizontal components, we need to add up the horizontal components of each force. We can use trigonometry to find the horizontal and vertical components of each force

Force #1 horizontal component = 400 cos(70) = 125.47 N

Force #2 horizontal component = 510 cos(100) = -158.95 N (negative because it acts in the opposite direction)

Force #3 horizontal component = 702 cos(260) = -596.28 N (negative because it acts in the opposite direction)

Therefore, the summation of the horizontal components is

125.47 N - 158.95 N - 596.28 N = -629.76 N

To find the summation of the vertical components, we need to add up the vertical components of each force

Force #1 vertical component = 400 sin(70) = 377.95 N

Force #2 vertical component = 510 sin(100) = 500.62 N

Force #3 vertical component = 702 sin(260) = -514.89 N (negative because it acts in the opposite direction)

Therefore, the summation of the vertical components is

377.95 N + 500.62 N - 514.89 N = 363.68 N

So the summation of the horizontal components is -629.76 N, and the summation of the vertical components is 363.68 N.

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The function can be used to find the amount in dollars Luis can spend on entertainment is 1/6(x-35)

Total amount of money luis get from his parent = x dollars

The amount luis has to pay to his parents for his cell phone is $35

After giving money for cell phone the amount of money left with luis will be x - 35

so, remaining money with luis = x - 35

One sixth of the remaining money which can be spent on entertainment by luis is 1/6(x-35)

The function can be written in the form of

f(x) = 1/6(x-35)

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To optimize the company's inventory costs, we need to determine the optimal order quantities for both tablets and laptops.

Let's start by finding the optimal order quantity for tablets:

Total cost (TC) = ordering cost + holding cost

Ordering cost = (demand rate/order quantity) x ordering cost per shipment

Holding cost = (order quantity/2) x unit cost x holding cost rate

We can set these two costs equal to each other and solve for the optimal order quantity (Q):

(demand rate/Q) x ordering cost per shipment = (Q/2) x unit cost x holding cost rate

Solving for Q, we get:

Q = sqrt((2 x demand rate x ordering cost per shipment)/(unit cost x holding cost rate))

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

Q = sqrt((2 x 10000 x 10000)/(100 x 0.25)) = 2000

Therefore, the optimal order quantity for tablets is 2000 units per shipment.

Next, let's find the optimal order quantity for laptops:

Following the same procedure as for tablets, we get:

Q = sqrt((2 x 4000 x 10000)/(400 x 0.25)) = 2000

Therefore, the optimal order quantity for laptops is also 2000 units per shipment.

In summary, the company should place orders of 2000 units each for both tablets and laptops to minimize its inventory costs.

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We can see here that an equation to show the total length of the bandages if they are placed end-to-end is:

([tex]1\frac{1}{4}[/tex] × [tex]2) + (1\frac{2}{4}[/tex] × 1) + ([tex]1\frac{3}{4}[/tex] × 3) + (2 × 4) + (3 × 6) = [tex]35\frac{1}{4}[/tex]

An equation in mathematics is a claim made regarding the equality of two expressions. Normally, it has two sides that are separated by an equal sign (=).

Variables, constants, and mathematical operations including addition, subtraction, multiplication, division, exponentiation, and more can be used on each side of the equation.

We can see here that the above answer is correct because on the number line:

[tex]1\frac{1}{4}[/tex] has 2 Xs on it.

[tex]1\frac{2}{4}[/tex] has 1 X on it.

[tex]1\frac{3}{4}[/tex] has 3 Xs on it.

2 has 4 Xs on it.

3 has 6 Xs on it.

And multiplying and adding the variables, we arrived at:  [tex]35\frac{1}{4}[/tex]

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The probability that a marble selected from the jar is green, P(green) = 5/19. The correct option is therefore;

5/19

The theoretical probability that an event will occur is the ratio of the number of required event to the number of all possible events occurring.

The required parameter is the probability of marble in the jar to be green, P(green)

The number of each color of marbles in the jar are;

Red = 5, Yellow = 11, Blue = 7, Green = 10, Brown = 5

The total number of marbles in the jar is therefore;
5 + 11 + 7 + 10 + 5 = 38

The probability that a marble in the jar is green, P(green) = 10/38 = 5/19

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To evaluate the integral 4 cos x^2 dx dy dz, 2y by changing the order of integration, we first need to determine the limits of integration.

Integrating with respect to x first, we have:
∫∫∫ 4 cos x^2 dx dy dz, 2y
= ∫∫ [2 sin x^2]y=0 to y dz, 2y
= ∫ [2 sin x^2]z=0 to z dz, 2y
= 2y ∫ [sin x^2]z=0 to z dz

Next, integrating with respect to z, we have:
2y ∫ [sin x^2]z=0 to z dz
= 2y [cos x^2]z=0 to z
= 2y [cos z^2 - 1]
Finally, integrating with respect to y, we have:

∫∫∫ 4 cos x^2 dx dy dz, 2y
= ∫∫ 2y [cos z^2 - 1] dy dz
= ∫ [y^2(cos z^2 - 1)]z=0 to z dz
= ∫ y^2(cos z^2 - 1) dz
Therefore, we have changed the order of integration from dx dy dz, 2y to dz dy dx, and the new limits of integration are:
0 ≤ z ≤ √(π/2)
0 ≤ y ≤ √(π/2 - z^2)
0 ≤ x ≤ √(π/2 - y^2 - z^2)

We can now evaluate the integral using these new limits and the equation we derived earlier:
∫∫∫ 4 cos x^2 dx dy dz, 2y
= ∫∫∫ 4 cos x^2 dz dy dx, 2y
= ∫ from 0 to √(π/2) ∫ from 0 to √(π/2 - z^2) ∫ from 0 to √(π/2 - y^2 - z^2) y^2(cos z^2 - 1) dx dy dz
= -4/3π
Therefore, the value of the integral is -4/3π.
To evaluate the integral by changing the order of integration, first, we need to rewrite the given integral in the correct notation. Unfortunately, the provided integral seems to have some errors or missing information, making it difficult to give a complete answer.

Please provide the correct integral and the limits of integration for each variable (x, y, and z) so I can assist you better.

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To find the equation of the tangent line to the curve y = sin(4x) cos(10x) at x = pi/4, we need to find the slope of the tangent line at that point.

First, we need to find the derivative of the function y = sin(4x) cos(10x) using the product rule:

y' = (cos(4x)cos(10x))(-4sin(10x)) + (sin(4x))(-sin(10x)(10cos(10x)))
y' = -4cos(4x)cos(10x)sin(10x) - 10sin(4x)cos^2(10x)

Now we can find the slope of the tangent line at x = pi/4 by plugging in pi/4 into the derivative:

y'(pi/4) = -4cos(pi/2)cos(5pi/2)sin(5pi/2) - 10sin(pi/2)cos^2(5pi/2)
y'(pi/4) = -4(0)(-1)(-1) - 10(1)(1)
y'(pi/4) = 10

So the slope of the tangent line at x = pi/4 is 10. We also know that the point (pi/4, sin(4(pi/4))cos(10(pi/4))) is on the tangent line. This simplifies to (pi/4, 0.5), since sin(4(pi/4)) = sin(pi) = 0 and cos(10(pi/4)) = cos(5pi/2) = 0.

Using the point-slope form of the equation of a line, we can write the equation of the tangent line as:

y - 0.5 = 10(x - pi/4)

Simplifying, we get:

y = 10x - 5 + 0.5
y = 10x - 4.5

So the equation of the tangent line to the curve y = sin(4x) cos(10x) at x = pi/4 is y = 10x - 4.5.
To find the equation of the tangent line to the curve y = sin(4x)cos(10x) at x = a/4, we first need to calculate the derivative of y with respect to x, and then evaluate the derivative at the given point x = a/4.

1. Calculate the derivative of y with respect to x using the product rule:
y' = (sin(4x))'(cos(10x)) + (sin(4x))(cos(10x))'

2. Differentiate sin(4x) and cos(10x) using the chain rule:
(sin(4x))' = 4cos(4x)
(cos(10x))' = -10sin(10x)

3. Plug the derivatives back into the product rule equation:
y' = (4cos(4x))(cos(10x)) + (sin(4x))(-10sin(10x))

4. Evaluate the derivative at x = a/4:
y'(a/4) = (4cos(a))(cos(10(a/4))) + (sin(a))(-10sin(10(a/4)))

5. Find the value of y at x = a/4:
y(a/4) = sin(4(a/4))cos(10(a/4))

6. Use the point-slope form to find the equation of the tangent line:
y - y(a/4) = y'(a/4)(x - a/4)

Since the value of "a" is not specified, this is the most concise form of the equation for the tangent line to the curve y = sin(4x)cos(10x) at x = a/4.

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The correct option is: (d) a discontinuity at x = 5 only.

The function f(x) is defined as:

[tex]f(x) = (x-3)/(x^2 - 8x + 15)[/tex]

The denominator of this function can be factored as:

[tex]x^2 - 8x + 15 = (x - 3)(x - 5)[/tex]

So the function can be rewritten as:

f(x) = (x - 3)/[(x - 3)(x - 5)]

Simplifying this expression, we get:

f(x) = 1/(x - 5)

Now it is clear that the function has a discontinuity at x = 5, since the denominator of the simplified expression becomes zero at that point.

Therefore, the correct option is:

d. a discontinuity at x = 5 only

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Amelia's rate of reading was approximately 1.67 books per month (calculated by dividing the total number of books, 5, by the number of months, 3).

To calculate Amelia's rate of reading in books per month, we divide the total number of books she read (5) by the number of months (3). Therefore, her rate of reading is 5/3 books per month.

To resize the right columns to represent the unit rate, you would need to scale them down. If the left column represents the number of months and the right column represents the number of books read, you could adjust the scale so that each unit on the right column represents 1 book per month.

For example, if each square unit on the left column represents 1 month and each square unit on the right column represents 0.5 books, you could resize the right column so that each square unit represents 1 book. This would ensure that the visual representation accurately reflects the unit rate of books per month.

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Answer:

x=28

Step-by-step explanation:

Let the length of QR be 'x' cm.

(We will be using the chord theorem; the products of the lengths of the line segments on each chord are equal.)

Therefore,

PR x QR = NR x OR

13 x = 30 x 12

x= 360/13

x = 27.7

x = 28