document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=91230>Question 91230</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The value 'V'(in dollars per acre) of a wheat crop 'd' days after planting is given by V=12d-0.5d^2 for 20<d<80. Find the maximum value of an acre of wheat. How many days aftr it was planted will it take to achieve this maximum value? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #66225 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=66225\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The value 'V'(in dollars per acre) of a wheat crop 'd' days after planting is\r<BR>\n" );
document.write( "\n" );
document.write( "given by V=12d-0.5d^2 for 20 < d < 80. <BR>\n" );
document.write( "Find the maximum value of an acre of wheat. \r<BR>\n" );
document.write( "\n" );
document.write( "How many days after it was planted will it take to achieve this maximum value?<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Maximum occurs at d = -b/2a = -12/(2*-0.5) = 12\r<BR>\n" );
document.write( "\n" );
document.write( "V(d) = 12*12 - 0.5(12^2) = $72 per acre<BR>\n" );
document.write( "=========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );