document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=829718>Question 829718</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular field will be fenced on all four sides. Fencing for the north and south sides costs $9 per foot and fencing for the other two sides costs $8 per foot. What is the maximum area that can be enclosed for $4800? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #500063 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=500063\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A+ ALIGN=MIDDLE  ALT=\"+A+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = area of the field<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+L+ ALIGN=MIDDLE  ALT=\"+L+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = length of the field<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+ ALIGN=MIDDLE  ALT=\"+W+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the width of the field<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A+=+L%2AW+ ALIGN=MIDDLE  ALT=\"+A+=+L%2AW+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+2%2A9%2AL+%2B+2%2A8%2AW+ ALIGN=MIDDLE  ALT=\"+4800+=+2%2A9%2AL+%2B+2%2A8%2AW+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+18L+%2B+16W+ ALIGN=MIDDLE  ALT=\"+4800+=+18L+%2B+16W+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "----------------------<BR>\n" );
document.write( "I can say;<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+L+=+A%2FW+ ALIGN=MIDDLE  ALT=\"+L+=+A%2FW+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and substitute<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+18%2A%28+A%2FW+%29+%2B+16W+ ALIGN=MIDDLE  ALT=\"+4800+=+18%2A%28+A%2FW+%29+%2B+16W+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+ ALIGN=MIDDLE  ALT=\"+W+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800W+=+18A+%2B+16W%5E2+ ALIGN=MIDDLE  ALT=\"+4800W+=+18A+%2B+16W%5E2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+18A+=+-16W%5E2+%2B+4800W+ ALIGN=MIDDLE  ALT=\"+18A+=+-16W%5E2+%2B+4800W+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A+=+%28-8%2F9%29%2AW%5E2+%2B+%28+2400%2F9+%29%2AW+ ALIGN=MIDDLE  ALT=\"+A+=+%28-8%2F9%29%2AW%5E2+%2B+%28+2400%2F9+%29%2AW+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "This is a parabola with a maximum at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W%5Bmax%5D+=+-b%2F%282a%29+ ALIGN=MIDDLE  ALT=\"+W%5Bmax%5D+=+-b%2F%282a%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > where<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+a+=+-8%2F9+ ALIGN=MIDDLE  ALT=\"+a+=+-8%2F9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+800%2F3+ ALIGN=MIDDLE  ALT=\"+b+=+800%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W%5Bmax%5D+=+-%28+2400%2F9+%29+%2F+%28+2%2A%28+-8%2F9+%29+%29+ ALIGN=MIDDLE  ALT=\"+W%5Bmax%5D+=+-%28+2400%2F9+%29+%2F+%28+2%2A%28+-8%2F9+%29+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W%5Bmax%5D+=+2400%2F16+ ALIGN=MIDDLE  ALT=\"+W%5Bmax%5D+=+2400%2F16+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W%5Bmax%5D+=+150+ ALIGN=MIDDLE  ALT=\"+W%5Bmax%5D+=+150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and since<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+%28-8%2F9%29%2AW%5E2+%2B+%28+2400%2F9+%29%2AW+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+%28-8%2F9%29%2AW%5E2+%2B+%28+2400%2F9+%29%2AW+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+%28-8%2F9%29%2A150%5E2+%2B+%28+2400%2F9+%29%2A150+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+%28-8%2F9%29%2A150%5E2+%2B+%28+2400%2F9+%29%2A150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+%28-8%2F9%29%2A22500+%2B+40000+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+%28-8%2F9%29%2A22500+%2B+40000+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+-20000+%2B+40000+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+-20000+%2B+40000+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+20000+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+20000+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ft2<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+18L+%2B+16W+ ALIGN=MIDDLE  ALT=\"+4800+=+18L+%2B+16W+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+18L+%2B+16%2A150+ ALIGN=MIDDLE  ALT=\"+4800+=+18L+%2B+16%2A150+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+4800+=+18L+%2B+2400+ ALIGN=MIDDLE  ALT=\"+4800+=+18L+%2B+2400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+18L+=+2400+ ALIGN=MIDDLE  ALT=\"+18L+=+2400+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+L%5Bmax%5D+=+133.333+ ALIGN=MIDDLE  ALT=\"+L%5Bmax%5D+=+133.333+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+W%5Bmax%5D%2AL%5Bmax%5D+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+W%5Bmax%5D%2AL%5Bmax%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+150%2A133.333+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+150%2A133.333+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%5Bmax%5D+=+19999.95+ ALIGN=MIDDLE  ALT=\"+A%5Bmax%5D+=+19999.95+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The error is due to rounding off\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );