document.write( "Question 951476: Solve for r^2\r
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Algebra.Com's Answer #581050 by MathLover1(20849)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"L=4%2Api%2At+%2B+7r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"L-4%2Api%2At=7r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"r%5E2=%28L-4%2Api%2At%29%2F7\"
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