document.write( "Question 34877: 1. Find the radius of a circle with circumference of 20pi.\r
\n" ); document.write( "\n" ); document.write( "2.Find the radius of a circle with the circumference of 64pi\r
\n" ); document.write( "\n" ); document.write( "3.If the area of a circle is 9pi, find the radius.\r
\n" ); document.write( "\n" ); document.write( "4.If the area of a circle is 64 pi, find the circumference.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "help much appreciated.
\n" ); document.write( "

Algebra.Com's Answer #21104 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
CIR=2*PI*R OR 20*PI=2*PI*R DIVIDING BOTH SIDES BY 2*PI WE GET R=10\r
\n" ); document.write( "\n" ); document.write( "CIR=2*PI*R OR 64*PI=2*PI*R DIVIDING BOTH SIDES BY 2*PI WE GET R=32\r
\n" ); document.write( "\n" ); document.write( "AREA=PI*R~2 OR 9*P1=PI*R~2 DIVIDING BOTH SIDES BY PI WE GET R~2=9 OR R=3\r
\n" ); document.write( "\n" ); document.write( "AREA=PI*R~2 OR 64*PI=PI*R~2 DIVIDING BOTH SIDES BY PI WE GET R~2=54 OR R=8
\n" ); document.write( "
\n" );