document.write( "Question 300204: A tractor that 4 years ago cost $8000, is now worth only $3200. Find the average annual rate of depreciation. \r
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Algebra.Com's Answer #215462 by mananth(16946)\"\" \"About 
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A tractor that 4 years ago cost $8000, is now worth only $3200. Find the average annual rate of depreciation. \r
\n" ); document.write( "\n" ); document.write( "the depreciation amount in 4 years is $4800\r
\n" ); document.write( "\n" ); document.write( "On 8000 the depreciation is 4800\r
\n" ); document.write( "\n" ); document.write( "for one year it is 1200\r
\n" ); document.write( "\n" ); document.write( "100*1200 / 8000\r
\n" ); document.write( "\n" ); document.write( "=15%
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