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The formula for area of a circle is:

A = pi * r2 (area equals pi times radius squared)

There fore if you plug in the numbers you know (pi = 3.14) you get

125 = 3.14 * r2

39.8 = r2

r = 6.31 inches

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Q: What is the Radius of a circle with an area of 125 inches?
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