document.write( "Question 480322: What is the exact area of a circle with a diameter of 21 inches? Please help if you can! Thank you. \n" ); document.write( "

Algebra.Com's Answer #328979 by Edwin McCravy(20059) $\"\"$ $\"About$

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document.write( "The radius r is  the diameter, which is 21,\r\n" );
document.write( "so the radius r = \r\n" );
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