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OpenStudy (mathhelp346):
PLEASE HELP: The area of a circle is given by A=πr^2, where r is the radius. If the radius of a circle is increased y 4 inches, the area of the resulting circle is 100π square inches. Find the radius of the original circle.
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OpenStudy (mathhelp346):
This is what I did, but it's wrong. |dw:1354247106626:dw|
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