document.write( "Question 1058115: The marginal cost C(in dollars) to produce x bicycles is C(x)=x^2-40x+530,
\n" ); document.write( " Find the marginal cost of producing 40 bicycles \r
\n" ); document.write( "\n" ); document.write( "How many bicycles can be manufactured so that the marginal cost equals $130.
\n" ); document.write( "solve C(x)=130
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Algebra.Com's Answer #673123 by stanbon(75887)\"\" \"About 
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The marginal cost C(in dollars) to produce x bicycles is C(x)=x^2-40x+530,
\n" ); document.write( " Find the marginal cost of producing 40 bicycles
\n" ); document.write( "C(40) = 40^2 - 40*40 + 530 = 1600 - 1600 + 530 = $530
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\n" ); document.write( "How many bicycles can be manufactured so that the marginal cost equals $130.
\n" ); document.write( "solve C(x)=130
\n" ); document.write( "x^2 - 40x + 530 = 130
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\n" ); document.write( "x^2 - 40x + 400 = 0
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\n" ); document.write( "(x-20)(x-20) = 0
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\n" ); document.write( "x = 20 bicycles
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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