document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1041311>Question 1041311</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given the following revenue and cost functions, find the x-value that makes revenue a maximum.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=R%28x%29+=+68x+-+2x%5E2%3B ALIGN=MIDDLE  ALT=\"R%28x%29+=+68x+-+2x%5E2%3B\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+C%28x%29+=+21x+%2B+97 ALIGN=MIDDLE  ALT=\"+C%28x%29+=+21x+%2B+97\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The answer is supposedly 17, but no matter what I do I can't figure out how to get it? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #656270 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=656270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The cost function is not involved in finding max x for the revenue function.  You have two separate functions, R for revenue and C for cost.  \r<BR>\n" );
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document.write( "Where is R a maximum value?<BR>\n" );
document.write( "Between the zeros in the exact middle.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=68x-2x%5E2=0 ALIGN=MIDDLE  ALT=\"68x-2x%5E2=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=34x-x%5E2=0 ALIGN=MIDDLE  ALT=\"34x-x%5E2=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2834-x%29=0 ALIGN=MIDDLE  ALT=\"x%2834-x%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Zeros are at 0 and at 34.  The maximum occurs exactly between these two values! </SPAN>\n" );
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