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Bess [88]
3 years ago
15

7.

Mathematics
1 answer:
Iteru [2.4K]3 years ago
7 0

Answer:

a. 45 π

b. 12 π

c. 16 π

Step-by-step explanation:

a.

If a 3×5 rectangle is revolved about one of its sides of length 5 to create a solid of revolution, we can see a cilinder with:

Radius: 3

Height: 5

Then the volume of the cylinder is:

V=π*r^{2} *h= π*(3)^{2} *(5) = π*(9)*(5)=45 π

b. If a 3-4-5 right triangle is revolved about a leg of length 4 to create a solid of revolution. We can see a cone with:

Radius: 3

Height: 4

Then the volume of the cone is:

V=(1/3)*π*r^{2} *h= (1/3)*π*(3)^{2} *(4) = (1/3)*π*(9)*(4)=12 π

c. We can answer this item using the past (b. item) and solving for the other leg revolution (3):

Then we will have:

Radius: 4

Height: 3

Then the volume of the cone is:

V=(1/3)*π*r^{2} *h= (1/3)*π*(4)^{2} *(3) = (1/3)*π*(16)*(3)=16 π

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Answer:

118.8

Step-by-step explanation:

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Cost price=Selling price- Cost price

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2 years ago
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liraira [26]

Answer:

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Step-by-step explanation:

Well, the question is a bit hard to read, but I assume the radius is equal to 2?

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The number п is equal to 3.14

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8 0
2 years ago
A rectangular window has a length of 81.47 cm and a width of 34.2 cm. What is the least precise measurement of the perimeter of
Pie

The least precise measurement of the perimeter of the window is 231.30

Step-by-step explanation:

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Perimeter=231.34

Perimeter=231.30(4 significant figures)

Learn More

  • Significant figures : brainly.com/question/11566364

Keywords : Perimeter, Least precise measurement

#LearnwithBrainly

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3 years ago
Find the zeros of the function.
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2) Set Equal To 0:
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3) Solve:
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3 years ago
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