document.write( "Question 1061310: The head of a circular drum has an area of 9x^2pi +12xpi+4pi. \r
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Algebra.Com's Answer #676096 by ikleyn(52803)\"\" \"About 
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\n" ); document.write( "The head of a circular drum has an area of 9x^2pi +12xpi+4pi. \r
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document.write( "The radius is \"sqrt%289x%5E2%2B12x+%2B4%29\" = \"sqrt%28%283x%2B2%29%5E2%29\" = |3x+2|.\r\n" );
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document.write( "If x= 9, then the radius is 3*9+2 = 27+2 = 29 units.\r\n" );
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