document.write( "Question 979714: The revenue R received for selling x stereos is given by the formula
\n" ); document.write( "R = −(x^2/3) + 70x − 800.\r
\n" ); document.write( "\n" ); document.write( "How many stereos must be sold to obtain the maximum revenue?\r
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\n" ); document.write( "\n" ); document.write( "Find the maximum revenue. \n" ); document.write( "
Algebra.Com's Answer #600994 by Alan3354(69443)\"\" \"About 
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The revenue R received for selling x stereos is given by the formula
\n" ); document.write( "R = −(x^2/3) + 70x − 800.\r
\n" ); document.write( "\n" ); document.write( "How many stereos must be sold to obtain the maximum revenue?\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Find the maximum revenue.
\n" ); document.write( "===================
\n" ); document.write( "R = -(x^2/3) + 70x - 800.
\n" ); document.write( "Is it x^2/3 ?
\n" ); document.write( "Or x^(2/3) ?
\n" ); document.write( "--------
\n" ); document.write( "Assuming the former:
\n" ); document.write( "R = -(x^2)/3 + 70x - 800
\n" ); document.write( "dR/dx = -2x/3 + 70 = 0
\n" ); document.write( "--> x = 105 stereos for max
\n" ); document.write( "=============
\n" ); document.write( "R = -(105^2)/3 + 70*105 - 800
\n" ); document.write( "R = $2875 max revenue
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