document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1157514>Question 1157514</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular field beside a river is to be fenced by 80 meters of fencing. No fence is needed along the riverbank. What are the dimensions of the field that maximize its area? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #780389 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=780389\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x, x, 80-2x<BR>\n" );
document.write( "The three lengths<BR>\n" );
document.write( "80-2x is length parallel to riverbank\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2880-2x%29 ALIGN=MIDDLE  ALT=\"x%2880-2x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, area\r<BR>\n" );
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document.write( "Maximum area should be in exact middle between the zeros.\r<BR>\n" );
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document.write( "One zero is 0.\r<BR>\n" );
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document.write( "Other zero is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80-2x=0 ALIGN=MIDDLE  ALT=\"80-2x=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40-x=0 ALIGN=MIDDLE  ALT=\"40-x=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=40 ALIGN=MIDDLE  ALT=\"x=40\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Exact middle of 0 and 40 is 20.\r<BR>\n" );
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document.write( "Dimensions to max area:\r<BR>\n" );
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document.write( "20 and 40. </SPAN>\n" );
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