document.write( "Question 13423: Given: $\"S=%282%2API%2Ar%2Ah%29%2B%282%2API%2Ar%5E2%29\"$ , solve for r. \n" ); document.write( "

Algebra.Com's Answer #6791 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
You could try this:\r
\n" ); document.write( "\n" ); document.write( " $\"S+=+2%28pi%29rh+%2B+2%28pi%29r%5E2\"$ Factor $\"2%28pi%29\"$ and divide both sides by it.
\n" ); document.write( " $\"S%2F2%28pi%29+=+rh+%2B+r%5E2\"$ Subtract $\"S%2F2%28pi%29\"$ from both sides.
\n" ); document.write( " $\"r%5E2+%2B+hr+-+S%2F2%28pi%29+=+0\"$ Solve for r using the quadratic formula.
\n" ); document.write( " $\"r+=+%28-h%2B-sqrt%28%28-h%29%5E2+-+4%28-S%2F2%28pi%29%29%29%29%2F2\"$
\n" ); document.write( " $\"r+=+%28-h%2B-sqrt%28h%5E2%2B%282S%2F%28pi%29%29%29%29%2F2\"$ \n" ); document.write( "

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