document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098121>Question 1098121</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The marginal cost (C) of manufacturing x cell phones (in thousands) is given by: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=C%28x%29=+5x%5E2-200x%2B4000 ALIGN=MIDDLE  ALT=\"C%28x%29=+5x%5E2-200x%2B4000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "A. How many cell phones should be manufactured to minimize the marginal cost? <BR>\n" );
document.write( "B. What is the minimum marginal cost? \r<BR>\n" );
document.write( "\n" );
document.write( "My work was = <BR>\n" );
document.write( "A. Using <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-b%2F2a ALIGN=MIDDLE  ALT=\"-b%2F2a\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-200%29%2F%282%29%285%29 ALIGN=MIDDLE  ALT=\"%28-200%29%2F%282%29%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >= 20 or 20,000 phones to minimize the marginal cost. <BR>\n" );
document.write( "B. I subbed in 20 as the x value in the given equation resulting in the minimum marginal cost being $2000. \r<BR>\n" );
document.write( "\n" );
document.write( "I am uncertain if this is how to approach the question. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #712522 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52781)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=712522\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "The solution and the answer &nbsp;\"10\"&nbsp; given by @gosgarithmetic is  &nbsp;&nbsp;<U>W R O N G</U>.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "For your safety, &nbsp;&nbsp;<U>S I M P L Y &nbsp;&nbsp;I G N O R E &nbsp;&nbsp;I T</U>.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );