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24 May, 23:27

A circle has an area of 153.86 square inches. Using 3.14 for pi, find the radius and circumference of the circle. Round your answer to the nearest hundredth when necessary.

A) R = 7 inches ... C = 43.96 inches

B) R = 24.5 inches ...

C = 153.86 inches

C) 49 inches ... C = 98 inches

D) R = 8 inches ... C = 50.24 inches

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Answers (1)
  1. 24 May, 23:46
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    The formula for the area of the circle is equal to pi * r^2. Since area is known, we can find the value of r.

    A = pi * r^2

    153.86 = 3.14 * r^2

    r^2 = 153.86/3.14

    r = 7 inches

    The formula for the circumference of a circle is 2*pi*r

    C = 2*3.14*7

    C = 43.96 inches.

    Thus the answer is

    A) R = 7 inches ... C = 43.96 inches
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