document.write( "Question 1158657: The time needed to make a photo enlargement varies jointly as its length and width. If it takes 12 seconds to make a 4\" by 6\" enlargement, how many seconds does it take to make one that is 8\" by 10\"? \n" ); document.write( "
Algebra.Com's Answer #781601 by Boreal(15235)\"\" \"About 
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T=kLW
\n" ); document.write( "12=k*6*4=24k
\n" ); document.write( "k=1/2\r
\n" ); document.write( "\n" ); document.write( "use k below
\n" ); document.write( "T=0.5*10*8
\n" ); document.write( "T=40 seconds
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