document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1036851>Question 1036851</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular area is to be fenced in using two types of fencing. The front and back uses fencing costing RM 5  a foot while sides use fencing costing RM 4 a foot. If the area of the rectangle must contain 500 square feet, what should the dimensions of the rectangle  be in order to keep the cost at a minimum ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #651602 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=651602\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A rectangular area is to be fenced in using two types of fencing.<BR>\n" );
document.write( " The front and back uses fencing costing RM 5 a foot while sides use fencing costing RM 4 a foot.<BR>\n" );
document.write( " If the area of the rectangle must contain 500 square feet, what should the dimensions of the rectangle be in order to keep the cost at a minimum ?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "let L = the length of the area<BR>\n" );
document.write( "let w = the width<BR>\n" );
document.write( "Area<BR>\n" );
document.write( "L * w = 500<BR>\n" );
document.write( "L = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%2Fw ALIGN=MIDDLE  ALT=\"500%2Fw\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ":<BR>\n" );
document.write( "Cost of fencing<BR>\n" );
document.write( "Cost = 5(2L) + 4(2W)<BR>\n" );
document.write( "C = 10L + 8w<BR>\n" );
document.write( "Replace L with 500/w<BR>\n" );
document.write( "C = 10(<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%2Fw ALIGN=MIDDLE  ALT=\"500%2Fw\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 8w<BR>\n" );
document.write( "graph this equation :y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5000%2Fw ALIGN=MIDDLE  ALT=\"5000%2Fw\"   DISABLED_style= \"max-width:90%; height:auto;\" > + 8w <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-10%2C+60%2C+-100%2C+600%2C+%285000%2Fx%29%2B8x%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-10%2C+60%2C+-100%2C+600%2C+%285000%2Fx%29%2B8x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cost is on the y axis, width on the x axis<BR>\n" );
document.write( "w = 25 ft for min cost<BR>\n" );
document.write( "then<BR>\n" );
document.write( "L = 500/25; minimum cost would calculate to: $400<BR>\n" );
document.write( "L = 20 ft is length<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );