document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=173679>Question 173679</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780073533490/algebrahomeworkh>Elementary and intermediate</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Linear Equations in Two Variables and Their Graphs; Variation\r<BR>\n" );
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document.write( "3.5 Solve each variation problem. \r<BR>\n" );
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document.write( "40. Cost of CDs. The cost for manufacturing a CD varies<BR>\n" );
document.write( "Inversely with the number of CDs made. \r<BR>\n" );
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document.write( "If the cost is<BR>\n" );
document.write( "$2.50 per CD when 10,000 are made, then what is the<BR>\n" );
document.write( "Cost per CD when 100,000 are made?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #128533 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=128533\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> varies inversely is nothing more than saying if one varible increases the other must decrease and takes the form of: if a varies inversely with b the <BR>\n" );
document.write( "a(b)=k.....so lets find our constant value<BR>\n" );
document.write( "Let cost of cd's be a and the number of cd's be b<BR>\n" );
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document.write( "a(b)=2.50(10000)=25000 ....so our constant k in this case is 25000<BR>\n" );
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document.write( "now we want to find the cost of a cd if 100000 cd's are made.<BR>\n" );
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document.write( "a(100000)=25000<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28a=25000%2F100000=.25%29 ALIGN=MIDDLE  ALT=\"highlight%28a=25000%2F100000=.25%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >cents cost of cd when 100000 are made<BR>\n" );
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document.write( "thats quite a savings ...me thinks I will have 100000 made and make lots more mulah....lol<BR>\n" );
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document.write( "since b increase we expected a to decrease and it did.  </SPAN>\n" );
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