document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1120669>Question 1120669</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A store sells 200 burgers daily at $4.59 each. Every 10 cents price increase reduces sales by 3 burgers. Find the maximum income from the burger sales and the price at which they should be sold.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #736332 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=736332\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Income is currently $918; let x=number sold<BR>\n" );
document.write( "(4.59+0.10x)*(200-3x)=918-13.77x+20x-0.3x^2=-0.3x^2+6.23x+918.<BR>\n" );
document.write( "  new price* #sold<BR>\n" );
document.write( "the vertex is at -b/2a or -6.23/-0.6=10.4 burgers.<BR>\n" );
document.write( "10 will yield slightly greater sales than 11<BR>\n" );
document.write( "for 10: 5.59*170=$950.30<BR>\n" );
document.write( "for 11: 5.69*167=$$950.23<BR>\n" );
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