document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=26143>Question 26143</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The cost of a pizza varies directly as the square of its radius. If a pizza with a 7 in radius costs $6.00, how much should a pizza with a 9-in radius cost?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #14076 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=14076\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Directly related means Cost=k(radius^2)<BR>\n" );
document.write( "To find \"k\" let cost be 6 and r be 7<BR>\n" );
document.write( "Then 6=k(7^2)<BR>\n" );
document.write( "So, k=6/49<BR>\n" );
document.write( "The relating equation is therefore y=(6/49)r^2<BR>\n" );
document.write( "So, if the radius is 9-inches the cost will be <BR>\n" );
document.write( "C=(6/49)9^2<BR>\n" );
document.write( "Cost=$9.92\r<BR>\n" );
document.write( "\n" );
document.write( "Cheers,<BR>\n" );
document.write( "stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );