Lalagrl Lalagrl

21-05-2019
Mathematics

contestada

Find the exact circumference of a circle with an approximate area of 78.5 square feet.

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quasarJose quasarJose

21-05-2019

Answer:

31.41ft

Step-by-step explanation:

the area A of a circle is πr² = 78.5 square feet

3.1416* r² = 78.5

r² =78.5/3.1416 = 24.987

r = √24.987 = 4.999ft

the circumference C of a circle is 2πr

C = 2* 3.1416 * 4.999 = 31.41ft

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