document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=417558>Question 417558</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In the formula R=0.4x-0.0001x^2. What is the Vertex and can you show me how you got it. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #292303 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=292303\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> R=0.4x-0.0001x^2<BR>\n" );
document.write( ".<BR>\n" );
document.write( "vertex consist, of course, (x,y)<BR>\n" );
document.write( "where:<BR>\n" );
document.write( "x = -b/(2a)<BR>\n" );
document.write( "x = -(0.4)/(2(-0.0001))<BR>\n" );
document.write( "x = -(0.4)/(-0.0002)<BR>\n" );
document.write( "x = 2000<BR>\n" );
document.write( ".<BR>\n" );
document.write( "plug in value of x to find your y:<BR>\n" );
document.write( "R=0.4(2000)-0.0001(2000)^2<BR>\n" );
document.write( "R=800-400<BR>\n" );
document.write( "R=400<BR>\n" );
document.write( ".<BR>\n" );
document.write( "vertex is at (2000, 400)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );