document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098434>Question 1098434</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Trees in urban areas help keep air fresh by absorbing carbon dioxide. A city has $2100 to spend on planting spruce and maple trees. The land available for planting is 45,000 square feet. Spruce trees cost $30 to plant and require 600 square feet of space. Maple trees cost $40 to plant and require 900 square feet of space. Spruce trees absorb 650 lb/yr of carbon dioxide and maple trees absorb 300lb/yr of carbon dioxide. How many of each tree should the city plant to maximize carbon dioxide absorption? <BR>\n" );
document.write( "S= spruce trees<BR>\n" );
document.write( "M= maple trees<BR>\n" );
document.write( "cost= 30s+40m is less than or equal to $2100<BR>\n" );
document.write( "space= 600s+900m is less than or equal to 45,000 square feet<BR>\n" );
document.write( "(I am having trouble with figuring out the objective function) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #712839 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=712839\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>\"Objective function\" is not just a mathematical term.  It means what it says.<br><BR>\n" );
document.write( "What IS the objective in this problem?  To maximize the amount of carbon dioxide absorbed by the trees.<br><BR>\n" );
document.write( "So the objective function is 650s + 300m </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );