SOLUTION: if the circumference of a circle is 10pi in.,what is the area,in square in.,of the circle? Please Help Thank You.

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Question 842366: if the circumference of a circle is 10pi in.,what is the area,in square in.,of the circle? Please Help Thank You.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
the formula for circumference is:
+C+=+2%2Api%2Ar+
+10%2Api+=+2%2Api%2Ar+
Divide both sides by +2%2Api+
+5+=+r+
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The formula for area is:
+A+=+pi%2Ar%5E2+
+A+=+pi%2A5%5E2+
+A+=+25%2Api+ in2