document.write( "Question 426383: how do i solve this problem??
\n" ); document.write( " \"if a circle has an area of 81 pi inches squared what is the circumference. leave your answer in terms of pi.\"
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Algebra.Com's Answer #296604 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
pir^2= 81pi the area\r
\n" ); document.write( "\n" ); document.write( "r^2= 81pi/pi
\n" ); document.write( "r^2=81
\n" ); document.write( "r=9
\n" ); document.write( "2pir = circumference
\n" ); document.write( "2*8*pi = circumference
\n" ); document.write( "16pi = circumference
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