document.write( "Question 321274: how many times does the volume of a sphere increases if the radius is \r
\n" ); document.write( "\n" ); document.write( "1) double 2)half
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Algebra.Com's Answer #230080 by Earlsdon(6294)\"\" \"About 
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The volume of a sphere is given by:
\n" ); document.write( "\"V+=+%284%2F3%29pi%2Ar%5E3\" Where r = radius.
\n" ); document.write( "1) Let's what happens when you double the radius:
\n" ); document.write( "\"V+=+%284%2F3%29pi%2A%282r%29%5E3\"
\n" ); document.write( "\"V+=+%284%2F3%29pi%2A%288r%5E3%29\" Move the 8 to the front.
\n" ); document.write( "\"V+=+8%284%2F3%29pi%2Ar%5E3\"...and you can see that the volume V is 8 times the original volume.
\n" ); document.write( "2) ...and if we divide the radius by 2...
\n" ); document.write( "\"V+=+%284%2F3%29pi%28r%2F2%29%5E3\"
\n" ); document.write( "\"V+=+%284%2F3%29pi%28r%5E3%2F8%29\" or...
\n" ); document.write( "\"V+=+%281%2F8%29%284%2F3%29pi%2Ar%5E3\" ...so the volume is decreased by a factor of 8.
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