document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=926462>Question 926462</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A store sells lecture notes, and the monthly revenue R of this store can be modelled by the function R(x) = 3000 +500x -100x2, where x is the peso increase over Php 4. What is the maximum revenue?\r<BR>\n" );
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document.write( "I could solve this (I think) but I really don't understand the question... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #562291 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=562291\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation R(x) = 3000 +500x -100x2 is a parabola that opens downward, we need to solve for the vertex,<BR>\n" );
document.write( "the x coordinate for the vertex is x = -b/2a = -500/-200 = 2.5<BR>\n" );
document.write( "substitute for x in our equation<BR>\n" );
document.write( "R(x) = 3000 +(500*2.5) -100*(2.5)^2 = 3625 peso's (max revenue)<BR>\n" );
document.write( "note that x is peso increase over the Philippine Peso (Php) 4\r<BR>\n" );
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