Please help me with this problem​

Only hole of function [tex]f(x) = \frac{x^{2}+7x+10 }{x^{2}+9x+20 }[/tex] is at x=(-4)

Step-by-step explanation:

Given the function is [tex]f(x) = \frac{x^{2}+7x+10 }{x^{2}+9x+20 }[/tex]

In order to find holes of any function, you should find when function is becoming undefined or say " infinity"

Given function is polynomial function.

It will become undefined become denominator become zero

[tex]x^{2}+9x+20=0[/tex]

Solving for x value when denominator become zero

[tex]x^{2}+9x+20=0\\x^{2}+5x+4x+20=0\\x(x+5)+4(x+5)=0\\(x+4)(x+5)=0[/tex]

we get possible holes at x=(-4) and x=(-5)

Check whether you can eliminate any holes

Now, Solving for x value when numerator become zero

[tex]x^{2}+7x+10=0\\x^{2}+5x+2x+10=0\\(x+5)(x+2)=0[/tex]

x=(-5) and x=(-2)

x=(-5) is common is both numerator and denominator.

So that, we can eliminate it.

[tex]f(x) = \frac{(x+5)(x+2)}{(x+5)(x+4)}[/tex]

[tex]f(x) = \frac{(x+2)}{(x+4)}[/tex]

Therefore, Only hole of function [tex]f(x) = \frac{x^{2}+7x+10 }{x^{2}+9x+20 }[/tex] is at x=(-4)

Answer:

Volume = 1346.275 [tex]ft^{3}[/tex]

Step-by-step explanation:

The radius of the pipe is 3.5 ft and height is 35 ft.

The volume of cylinder is found by the formula,

V = (π)([tex]R^{2})(h)[/tex]

(think about the formula as area of individual circles multiplied by the height of cylinder)

taking value of π as 3.14,

Where, the r = radius and h is height of cylinder.

inserting the above values,

[tex]V = (3.14)(3.5^{2})(35)[/tex]

V = 1346.275 [tex]ft^{3}[/tex]

Answer:

A. 25x^2 - 110x + 121

Step-by-step explanation:

(5x - 11)² = (5x)² - 2·5x·11 + (11)² = 25x² - 110x + 121

(a - b)² = a² - 2ab + b²

a. 25x² − 110x + 121

Answer:

  C)  $2,500

Step-by-step explanation:

Madison's profit is 25% of the $2000 paid, so is ...

  0.25 × $2000 = $500

That means the lot was sold for ...

  $2000 + 500 = $2500

_____

Profit can also be expressed as a percentage of the selling price. If that were the case here, Madison's initial cost would be 0.75 of the $2666.67 selling price, and the 25% profit would be $666.67. Since that is not among the answer choices, we presume our assumption is correct that Madison's profit is measured as a percentage of cost.

Answer:

c

Step-by-step explanation:

your welcome

Answer: The value of the card after you buy your 8th coffee will be $61.3

Step-by-step explanation:

The worth of the gift card for the coffee shop is $90. Each day you use the card to get a coffee for $4.10. This means that the worth of the gift card is reducing by $4.10 each day. This rate is in arithmetic progression.

The formula for the nth term of an arithmetic sequence, Tn is expressed as

Tn = a + (n-1)d

Where a is the first term

d is the common difference

n is the number of days

From the information given,

a = $90

d = - $4.1

The explicit formula representing the amount of money available will be

Tn = 90 - 4.1(n - 1)

The value of the card after you buy your 8th coffee will be

T8 = 90 - 4.1(8 - 1) = T8 = 90 - 4.1×7

T8 = 90 - 28.7

T8 = $61.3

Answer:

The final pressure of the gas when its temperature returns to its initial value [tex]1.8234\times 10^6[/tex] Pa.

Step-by-step explanation:

Given : An ideal gas is confined within a closed cylinder at a pressure of [tex]2.026\times 10^5[/tex] Pa by a piston. The piston moves until the volume of the gas is reduced to one-ninth of the initial volume.

To find : What is the final pressure of the gas when its temperature returns to its initial value?

Solution :

Since the temperature is constant .

The relation between P and V is given by,

[tex]P_1\times V_1 = P_2\times V_2[/tex]

[tex]\frac{P_1}{P_2}=\frac{V_2}{V_1}[/tex] ....(1)

The piston moves until the volume of the gas is reduced to one-ninth of the initial volume i.e. [tex]V_2=\frac{V_1}{9}[/tex]

or [tex]\frac{V_2}{V_1}=\frac{1}{9}[/tex]

[tex]P_1=2.026\times 10^5[/tex]

Substitute in equation (1),

[tex]\frac{2.026\times 10^5}{P_2}=\frac{1}{9}[/tex]

[tex]P_2=9\times 2.026\times 10^5[/tex]

[tex]P_2=18.234\times 10^5[/tex]

[tex]P_2=1.8234\times 10^6[/tex]

The final pressure of the gas when its temperature returns to its initial value [tex]1.8234\times 10^6[/tex] Pa.

Answer:

The probability to draw two red balls = 1/22

The probability to draw one red ball = 9/22

The probability to draw no red ball = 12/22

Step-by-step explanation:

Number of Red balls = 3

Number of White balls = 9

If the player draws two red balls, he receives $4

If the player draws one red ball, he receives $1

If the player draws no red ball, he looses $2

The total number of balls = 3+9

= 12

Let R represent Red balls

Let W represent White balls

The probability that the player earns $4 by picking two red balls is represented as Pr(R1 n R2)

Pr(R1 n R2) = Pr(R1) * Pr(R2)

Pr(R1) = 3/12

= 1/4

Pr(R2) = 2/11(we assume he draws without replacement)

Pr(R1 n R2) = 1/4*2/11

= 2/44

= 1/22

The probability of earning $4 is 1/22

The probability of drawing one red ball is Pr(R1 n W2) or Pr(W1 n R2)

Pr(R1) = 3/12

= 1/4

Pr(W2) = 9/11

Pr(W1) = 9/12

= 3/4

Pr(R2) = 3/11

Pr(R1 n W2) or Pr(W1 n R2) =

(1/4 * 9/11) + (3/4 * 3/11)

= (9/44) + (9/44)

= 18/44

= 9/22

Therefore, the probability of earning $1 is 9/22

The probability that no red ball is chosen is Pr(W1nW2)

Pr(W1) = 9/12

= 3/4

Pr(W2) = 8/12

Pr(W1nW2) = 3/4 * 8/11

= 24/44

= 12/22

therefore. the probability of loosing $2 is 12/22

The probability to draw two red balls is [tex]\(\frac{1}{22}\)[/tex], to draw one red ball is [tex]\(\frac{9}{22}\)[/tex], and to draw zero red balls is [tex]\(\frac{15}{22}\)[/tex].

To find the probability distribution, we need to calculate the probabilities of drawing two red balls, one red ball, and no red balls from the urn containing 3 red balls and 9 white balls. We use combinations to determine these probabilities.

1. Total Possible Combinations:

  The total number of ways to choose 2 balls out of 12 is given by the combination formula:

 [tex]\[ \binom{12}{2} = \frac{12!}{2!(12-2)!} = \frac{12 \times 11}{2 \times 1} = 66 \][/tex]

2. Probability of Drawing Two Red Balls:

  To draw 2 red balls, we select 2 out of the 3 red balls:

  [tex]\[ \binom{3}{2} = \frac{3!}{2!(3-2)!} = \frac{3 \times 2}{2 \times 1} = 3 \][/tex]

  The probability is:

 [tex]\[ P(\text{2 red balls}) = \frac{\binom{3}{2}}{\binom{12}{2}} = \frac{3}{66} = \frac{1}{22} \][/tex]

3. Probability of Drawing One Red Ball:

  To draw 1 red ball and 1 white ball, we select 1 out of the 3 red balls and 1 out of the 9 white balls:

 [tex]\[ \binom{3}{1} = 3 \quad \text{and} \quad \binom{9}{1} = 9 \][/tex]

  The number of ways to draw 1 red and 1 white ball is:

 [tex]\[ \binom{3}{1} \times \binom{9}{1} = 3 \times 9 = 27 \][/tex]

  The probability is:

  [tex]\[ P(\text{1 red ball}) = \frac{\binom{3}{1} \times \binom{9}{1}}{\binom{12}{2}} = \frac{27}{66} = \frac{9}{22} \][/tex]

4. Probability of Drawing Zero Red Balls:

  To draw 0 red balls (i.e., both balls are white), we select 2 out of the 9 white balls:

 [tex]\[ \binom{9}{2} = \frac{9!}{2!(9-2)!} = \frac{9 \times 8}{2 \times 1} = 36 \][/tex]

  The probability is:

 [tex]\[ P(\text{0 red balls}) = \frac{\binom{9}{2}}{\binom{12}{2}} = \frac{36}{66} = \frac{18}{33} = \frac{6}{11} = \frac{15}{22} \][/tex]

5. Probability Distribution for Earnings:

  Now, we summarize the probabilities and corresponding earnings

  - Drawing two red balls: [tex]\(\frac{1}{22}\)[/tex], earning $4

  - Drawing one red ball: [tex]\(\frac{9}{22}\)[/tex], earning $1

  - Drawing zero red balls: [tex]\(\frac{15}{22}\)[/tex], losing $2

Thus, the correct probability distribution for the experiment of playing the game and observing the player's earnings is:

- Probability to draw two red balls: [tex]\(\frac{1}{22}\)[/tex]

- Probability to draw one red ball: [tex]\(\frac{9}{22}\)[/tex]

- Probability to draw zero red balls: [tex]\(\frac{15}{22}\)[/tex]

Answer:

12.2 inches

Step-by-step explanation:

Write and solve a proportion.

Arc length / circumference = central angle / 360°

x / (2π × 7) = 100° / 360°

x = 12.2

The arc length is 12.2 inches

Answer:

Answer is  12-19 = -7

Step-by-step explanation:

12- 19 you can break 19  into 12 +7

then

it is easy to find  12-12 = 0

Now subtracts  0 - 7 =- 7

then

break 7 into 3 + 4

then

0 - 3 = -3

-3 - 4 = -7

So ,

12 - 19 = -7

Answer:

  3.9 mi/h

Step-by-step explanation:

We assume that the given speeds are the speeds of the boats relative to the water. If c is the speed of the current, we have ...

  time = distance/speed

  47/(15 +c) = 40/(20 -c)

  47(20 -c) = 40(15 +c) . . . . . . multiply by (20-c)(15+c)

  940 -600 = 40c +47c . . . . . add 47c-600

  340 = 87c . . . . . . . . . . . . . . . simplify; next divide by 87

  c = 340/87 ≈ 3.9080 . . . . mi/h

The speed of the current is about 3.9 mi/h.

Answer:

4.8 hours

Step-by-step explanation:

Let the time taken to hike uphill be T

Let the time taken taken to hike downhill = 8 -T

The average speed of walking up = 2 mph

Average speed of walking down = 3mph

Distance hiked uphill = Distance hiked downhill

Speed = distance /time

Distance = Speed * Time

2T = 3(8 -T)

2T = 24 - 3T

2T + 3T = 24

5T = 24

T = 24/5

T= 4.8 hours

Time taken to hike uphill = 4.8hours

Answer:

12 units

Step-by-step explanation:

The quickest way to go about this is;

From the figure, when you count the number of full square boxes inside the rectangle, they add up to 7 full square boxes of 1 unit by 1 unit. And the number of half square boxes inside the rectangle add up to 10 which is equal to 5 full square boxes.

So the total number of full square boxes of 1 unit by 1 unit inside the rectangle add up to 12 full square boxes. The area of each full square box is 1 * 1 =  1 units, therefore the area of the rectangle is equal to 1 * 12 = 12 units.

The weight rises at the same constant rate of 2ft/s that the worker walks away, regardless of how far the worker has travelled. When the worker walks away, the length of the rope attached to the weight decreases and thus raises the weight. Therefore, at both distances, 10ft and 30ft, the weight will be rising at 2ft/s.

This is a physics problem involving related rates under the concept of kinematics. When the worker walks, the total length of the rope (80 ft) remains the same, so as the worker's part of the rope increases, the part attached to the weight decreases causing an upward motion. The rates at which the worker walks away and the weight retracts up are directly related.

When the worker has walked 10 feet, the worker's part of the rope has become 50 ft (original 40ft + 10ft walked), thus the weight's part of the rope is 30ft (80ft total - 50ft). Because the worker is walking at a constant rate of 2ft/s, this means that the weight is also rising at that same constant rate of 2ft/s.

Then, when the worker has walked 30 feet, the worker's part of the rope has become 70ft, thus the weight's part of the rope is 10ft. As previously explained, because the worker has a constant rate of walking away, the weight also has a constant rate of 2ft/s in the upward direction. Regardless of the worker's position, it does not impact the rate of the weight's ascent.

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The weight rises at a constant rate of 1 ft/s regardless of whether the worker has walked 10 feet or 30 feet.

Finding the Rate of the Weight Rising

Distance from the connection point to the ceiling: 40 ft

Worker’s walking speed: 2 ft/s

As the worker walks away, the rope is extended, and the weight rises. We need to determine how fast the weight is rising after the worker has walked different distances. Here’s how to do it step-by-step:

Let x be the distance the worker has walked away from the initial point. Therefore, the total length of the rope now serves both the height the weight has risen (h) and the horizontal distance the worker has walked (x).

80 ft = 2h + x

0 = 2(dh/dt) + dx/dt

2(dh/dt) + 2 = 0

2(dh/dt) = -2

dh/dt = -1 ft/s

a) For 10 feet: Plugging into the length equation:

2h + 10 = 80

2h = 70

⇒ h = 35 ft

b) For 30 feet: Plugging into the length equation:

2h + 30 = 80

2h = 50

∴ h = 25 ft

The weight rises at a rate of 1 ft/s when the worker has walked either 10 feet or 30 feet because the rate change of height (dh/dt) is constant.

Answer:

[tex]\displaystyle 1\frac{119}{250}\:liter[/tex]

[tex]\displaystyle 7,5\:sleps[/tex]

[tex]\displaystyle 37,3\:sleps [/tex]

Step-by-step explanation:

[tex]\displaystyle 1\frac{119}{250} = \frac{1476}{1000}[/tex]

[tex]\displaystyle 1\frac{1}{13} \times 7 = 7\frac{7}{13} ≈ 7,538461538 ≈ 7,5[/tex]

[tex]\displaystyle \frac{41}{1\frac{1}{10}} = 37\frac{3}{11} ≈ 37,3[/tex]

I am joyous to assist you anytime.

Answer:

You can use A and B systems

Step-by-step explanation:

Lets call z the total speed of the boat. If the boat goes against the current, then, the current will drop the boat natural speed, and therefore z is obtained from substracting y from the rate of the boat on still water, x. Thus, z = x-y. If The boat goes in favor of the current, then the current will raise the speed, and we obtain z by adding y to x. If we want to calculate x and y, we know that:

On the first trip, z = x-y, and it took 6 hours to finish the 120 mile trip, therefore 6z = 120, or equivalently, 6(x-y)=120

On the return trip, z = x+y, and it took 5 hours to finish the trip, so we have 5z = 5(x+y) = 120.

Thus, in order so solve the problem, we can use system A and B.

Note that system A is equivalent to the equation x-y = 20, obtained by dididing everything by 6. If we divide by 5 the second equation we obtain that x+y = 24. We have

By summing this equations it follows that 2x = 44, therefore x = 22. Since x-y = 20, we obtain that y = 2.

Answer:

The correct answer is 6(x - y) = 120 and 5(x + y) = 120

Answer:

  2/π ≈ 0.637 m/s

Step-by-step explanation:

The rate of change of area with respect to time is ...

  A = πr²

  dA/dt = 2πr·dr/dt

Filling in given values in the above equations, we can find r and dr/dt.

  25π = πr²   ⇒   r = 5

  20 = 2π·5·dr/dt

  dr/dt = 20/(10π) = 2/π . . . . meters per second

The radius is increasing at the rate of 2/π ≈ 0.637 meters per second.

Answer:

A. No, the student is not right. The central limit theorem says nothing about the histogram of the sample values. It deals only with the distribution of the sample means.

Step-by-step explanation:

No, the student is not right. The central limit theorem says nothing about the histogram of the sample values. It deals only with the distribution of the sample means. The central limit theorem says that if we take a large sample (i.e., a sample of size n > 30) of any distribution with finite mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], then, the sample average is approximately normally distributed  with mean [tex]\mu[/tex] and variance [tex]\sigma^2/n[/tex].

Yes. The student is exactly what the theorem says.

True. According to the central limit theorem, as the sample size increases, the sampling distribution of the sample means becomes more Normal.

An example illustrates how from a population with a uniform distribution, as samples are drawn and the means are calculated, the distribution of these means approximates a normal distribution as the sample size increases.

The central limit theorem ensures that regardless of the population's distribution, with sufficiently large samples, the distribution of sample means tends towards a normal distribution.

For a sample size of n=12, the degrees of freedom (df) would be 11, and the critical t value for a two-tailed 95% confidence interval is typically around 2.201, as determined by a t-distribution table or statistical software.

To find the critical t* value corresponding to a 95% confidence level for a sample size of n=12, you must take into account that the degrees of freedom (df) are equal to n - 1, which is 11 in this case. You use a t-distribution, not the z-distribution, because the population standard deviation is unknown. The critical t* value can be found using a t-distribution table or statistical software.

With the degrees of freedom at 11 for a 95% confidence interval (two-sided), the critical t value is typically around 2.201. However, one must look up the exact value using statistical software or a t-distribution table, as the value may vary slightly based on different sources or rounding.

Thus, to answer the student's question: For a two-tailed 95 percent confidence interval and 11 degrees of freedom, the corresponding critical value t* will typically be around 2.201.

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Answer:

Step-by-step explanation:

The given equation is of the form ...

  ax² +bx +c = 0

where a=2, b=-1, c=-8.

The quadratic formula gives the solution to the above equation as ...

  [tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

So, for your equation, the solution is ...

  [tex]m=\dfrac{-(-1)\pm\sqrt{(-1)^2-4(2)(-8)}}{2(2)}=\dfrac{1\pm\sqrt{65}}{4}[/tex]

Comparing this to the form ...

  [tex]m=\dfrac{N\pm\sqrt{D}}{M}[/tex]

we see ...

Answer:32years old

Step-by-step explanation:

R= 2c+5

R+C= 101

2c+5+c=101

3c+5=101

3c=96

c=32

Answer:

32 years

Step-by-step explanation:

Let the age of Carlos be represented by x

Then the age of Raul can be represented as the sum of twice the age of Carlos and 5.

In other words, Raul's age = 2x + 5

Sum of Carlos and Raul's age is 101

That is, \[x + 2x + 5 = 101\]

Or, \[3x + 5 = 101\]

Or, \[3x = 96\]

Or, \[x = 32\]

Hence, the age of Carlos is 32 years.

Age of Raul on the other hand is 2*32 + 5 = 69 years

Sum of their ages is 32 + 69 = 101 years.

Answer:

The speed of right going rider is 9 mph

The speed of left going rider is 18 mph

Step-by-step explanation:

Given as :

The total distance apart both the riders = 54 miles

Let The speed of right going rider = x mph

and The speed of left going rider = 2 x  mph

The Distance cover by right going rider = D miles

The Distance cover by left going rider = 54 - D  miles

Total time for both = 2 hours

So, Time = [tex]\dfrac{\textrm Distance}{\textrm Speed}[/tex]

Or ,  Distance = speed × Time

For right going rider

       D = x × 2

For left going rider

      54 - D = 2 x × 2

Or, from first equation

     54 - 2 x = 4 x

or, 54 = 4 x + 2 x

or, 6 x = 54

∴   x = [tex]\frac{54}{6}[/tex]

I.e x = 9 mph

So, The speed of right going rider = 9 mph

and The speed of left going rider = 2 × 9 = 18  mph

Hence The speed of right going rider is 9 mph

and The speed of left going rider is 18 mph   answer

The conjunction is false because the number -343/9 is not an integer but is a rational number.

The number [tex]-\frac{343}{9} is an integer, and a rational number.
To determine the truth value of this conjunction, we need to understand that an integer is a whole number like -1, 0, or 1, and a rational number is a ratio of integers like 2/1 or 3/4.
Since the number [tex]-\frac{343}{9} is not an integer and also a rational number (since it can be expressed as -343/9), the conjunction is false.

Answer:

The answer to your question is 57.3 kg

Step-by-step explanation:

a)

   [tex]X stones \frac{14 pounds}{1 stone} \frac{1 kilogram}{2.2 pounds}[/tex]

   = [tex]\frac{14}{2.2}[/tex]

  = 6.36 X stones

b)    Weight = 6.36 (x)

x = 9 stones

      Weight = 6.36 (9)                

                    = 57.3 kg

Pilar will pay 30 cents less from the original amount by using reusable bags.

Step-by-step explanation:

Bags used by Pilar = b = 6

Price decrease per bag = 5 cents

Let x be the total amount paid by Pilar.

Decrease will lessen the amount paid by Pilar, therefore, according to statement;

P(x) = x - 5b

As she used 6 bags, therefore, putting b=6

[tex]P(x)=x-5(6)\\P(x)=x-30[/tex]

Pilar will pay 30 cents less from the original amount by using reusable bags.

Keywords: subtraction, function

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Answer:

x = 6

∠B = 126

Step-by-step explanation:

∠A = ∠B through alternate interior angles

∠A = ∠B

8x + 78 = 2x + 114

8x - 2x = 114 - 78

6x = 36

x = 36 ÷ 6

x = 6

∠B = 2x + 114

2(6) + 114

12 + 114

= 126

d1 || d2 => ∡A = ∡B

8x + 78° = 2x + 114°

8x - 2x = 114° - 78°

6x = 36°

x = 36° : 6

x = 6°

∡B = 2x + 114°

∡B = 2×6° + 114°

∡B = 12° + 114°

∡B = 126°

Answer: speed of jet A is 704 miles per hour

speed of jet B is 604 miles per hour

Step-by-step explanation:

Let the jets be jet A and jet B

Jet A and Jet B leave an air base at the same time and travel in opposite directions.

Let x = the speed of Jet A

Let y = the speed of jet B

One jet travels 100 miles an hour faster than the other. Let Jet A be the faster Jet. This means that

x = y + 100 - - - - - -1

If the two jets are 3924 miles apart after 3 hours, this means that both Jet A and Jet B travelled a total distance of 3924 miles after 3 hours.

Distance travelled = speed × time

Therefore,

Distance travelled by Jet A in 3 hours will be x × 3 = 3x miles.

Distance travelled by Jet B in 3 hours will be y × 3 = 3y miles.

Therefore, total distance is

3x + 3y = 3924 - - - - - - - -2

Substituting equation 1 into equation 2, it becomes

3(y+100) + 3y = 3924

3y + 300 + 3y = 3924

6y = 3924 - 300 = 3624

y = 3624/6 = 604 miles per hour

x = y + 100 = 604 + 100

x = 704 miles per hour

Answer:

270 more pounds of aluminium cans collected by Jessica than Min

Step-by-step explanation:

334 + 124 = 458 (Total pounds of aluminium cans collected by min)

414 + 314 = 728 (Total pounds of aluminium cans collected by Jessica)

728 - 458 = 270 (More pounds Jessica collected than Min)

Final answer:

Jessica collected 270 pounds more of aluminum cans than Min did over the two days. Min collected 458 pounds in total, and Jessica collected 728 pounds in total.

Explanation:

The student's question is asking us to compare the total amount of aluminum cans collected by two individuals, Min and Jessica, over a two-day period and determine how much more Jessica collected compared to Min. To solve this, we need to add the amounts collected by each individual for both days and then subtract Min's total from Jessica's total.

First, we find Min's total collection by adding her collections from Monday and Tuesday: 334 pounds + 124 pounds = 458 pounds.

Next, we find Jessica's total collection by adding her collections from Monday and Tuesday: 414 pounds + 314 pounds = 728 pounds.

Finally, we calculate how much more Jessica collected than Min by subtracting Min's total from Jessica's total: 728 pounds - 458 pounds = 270 pounds. Since the question asks for the answer as a mixed number in simplest form and 270 is already a whole number, our answer is simply 270 pounds. There is no need to convert to a mixed number.

Answer:

Step-by-step explanation:

We are told the manufacturer expects 0.3% to 0.5% of units to be defected,

So we find 0.3% and 0.5% of the 20,000units

0.3/100 multiplied by 20000 = 60units

0.5/100 multiplied by 20000 = 100units

So we now know from 20000units, between 60units to 100units will be defected

So we find the price of both 60units and 100units knowing that 1unit cost $2,500

60 multiplied by $2,500 equals $150,000

100 multiplied by $2,500 equals $250,000

So the answer is option D, between $150,000 and $250,000

The selling price will be $232 if he applies a 45% markup.

Step-by-step explanation:

Cost of each stereo = $160

Mark up = 45%

Amount of mark up = [tex]\frac{45}{100}*160[/tex]

Amount of mark up = [tex]\frac{7200}{100} = \$72[/tex]

Selling price = Cost of stereo + mark up

Selling price = 160 + 72 = $232

The selling price will be $232 if he applies a 45% markup.

Keywords: addition, markup

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C

Step-by-step explanation:

The volume of a cylinder = πr²h

= 33 cubic inches

The volume of a cone = ¹/3 πr²h

If the cylinder and come share the same radius and height then ‘πr²h’ part of the formulas is the same for both;

It means the difference in proportionality is ¹/3 (because even π is the same across board). The volume of the cone is therefore;

¹/3 (33)

= 11

= 11 cubic inches

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