document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=750924>Question 750924</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cost c(in dollars) of operating a certain concrete-cutting machine is related to the number of minutes n the machine is run by C(n)=2.6n^2-26n+640. What is the minimum cost? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #456886 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=456886\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Min occurs at n = -b/(2a) = -(-26)/(2*2.6) = 5\r<BR>\n" );
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document.write( "So min occurs at n = 5, plug it in to get the min cost\r<BR>\n" );
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document.write( "C(n) = 2.6n^2-26n+640\r<BR>\n" );
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document.write( "C(5) = 2.6(5)^2-26(5)+640\r<BR>\n" );
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document.write( "C(5) = 575\r<BR>\n" );
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document.write( "The min cost is $575\r<BR>\n" );
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