document.write( "Question 49510: Looking for variable expression for:\r
\n" ); document.write( "\n" ); document.write( "years------gallons
\n" ); document.write( "_______________________
\n" ); document.write( "0----------1024
\n" ); document.write( "5----------256
\n" ); document.write( "10---------64
\n" ); document.write( "15---------?
\n" ); document.write( "20---------?
\n" ); document.write( "

Algebra.Com's Answer #32969 by Juhi(44)\"\" \"About 
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15. 16
\n" ); document.write( "20. 4
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