3 years ago

Find the volume of a cylinder with the radius 5 millimeters and height 22 millimeters. Round to the nearest hundredth

Mathematics

1 answer:

Alexxx [7]3 years ago

8 0

plug : pi · 5^2 · 22 into a calculator and that is the answer

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3 years ago

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zzz [600]

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-3

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find two points on the line are exact on the grid,

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the another （-1,5）,

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3 years ago

The area of a circle is 9π in². What is the circumference, in inches? Express your answer in terms of \piπ

dangina [55]

Answer:

$6\pi$ in

Step-by-step explanation:

The formula to find the area of a circle: $\pi r^{2}$ , where $r$ is the radius.

The formula to find the circumference (perimeter) of a circle: $2\pi r$ , where $r$ is the radius.

1) To find the circumference of the circle, we need to find the radius ( $r$ ) first. Since the area of the circle is given to us, we need to equate this to the formula to find the area of a circle.

$9\pi =\pi r^2$

Cancel the $\pi$ by bringing it to the other side.

$9 =\pi r^2$ ÷ $\pi$

$9 = r^2\\\sqrt{9} = r\\3 = r$

2) Find the circumference of the circle by using the formula, $2\pi r$ .

= $2*\pi *3$

= $6\pi$ in

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