document.write( "Question 1003457: 1. The readout on an epllact machine shows that a person burned 320 calories during a 20 minute workout. How many calories will he burn during a 40 minute workout?\r
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Algebra.Com's Answer #620150 by fractalier(6550)\"\" \"About 
You can put this solution on YOUR website!
If calories are burned at the same rate, then we can look at the proportion
\n" ); document.write( "\"320%2F20+=+x%2F40\"
\n" ); document.write( "and if we double the time, we double the calories burned...or
\n" ); document.write( "640 calories
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