document.write( "Question 613262: Given the following revenue and cost functions, find the x-value that
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Algebra.Com's Answer #385919 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "R(x) = 55x - 2x^2 
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document.write( "C(x) = 21x + 98
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document.write( "P(x) = 55x - 2x^2 -(21x + 98)
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document.write( "P(x) = -2x^2 + 34x - 98
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document.write( "  x = 8.5 makes max profit
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