document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058270>Question 1058270</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The marginal cost C(in dollars) to produce x bicycles is C(x)=x^2-40x+530,<BR>\n" );
document.write( "A. Find the marginal cost of producing 40 bicycles <BR>\n" );
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document.write( "B. How many bicycles can be manufactured so that the marginal cost equals $130.<BR>\n" );
document.write( " solve C(x)=130\r<BR>\n" );
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document.write( "C. Economic theory states that to maximize profit, production should continue until marginal revenue equals marginal cost. Assuming revenue equals 230, how may bicycles should be manufactured?\r<BR>\n" );
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document.write( " Thanks for help tutors </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673802 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=673802\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To produce 40 bikes: <BR>\n" );
document.write( "A) C(40) = 40^2-40*40+530 = 530<BR>\n" );
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document.write( "B)x^2-40x+530 = 130<BR>\n" );
document.write( "x^2-40x+530-530 = 130-530<BR>\n" );
document.write( "x^2+(-40)x = -400 Take one half the coefficient of x (-40/2 = -20) and square it, then add to both sides:<BR>\n" );
document.write( "x^2+(-40)x+400 = 0 We have a perfect square. Factor it:<BR>\n" );
document.write( "(x-20)^2 = 0 Take the sqr rt on both sides<BR>\n" );
document.write( "x-20 = 0<BR>\n" );
document.write( "x = 20<BR>\n" );
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document.write( "You do C, I'm tired of this problem.\r<BR>\n" );
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