document.write( "Question 921321: Express the area A of a circle as a function of its circumference C.
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Algebra.Com's Answer #558945 by richard1234(7193)\"\" \"About 
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Write A = something, where something is in terms of C and constants\r
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\n" ); document.write( "\n" ); document.write( "Hint: A = pi*r^2 and C = 2*pi*r. Rewrite r in terms of C and substitute into the expression for A.
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