document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=924820>Question 924820</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help. If s varies directly as r^2, and s=64 when r=2. Find s when r=5. Thanks for your help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #561096 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=561096\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s varies directly as r^2, then we have<BR>\n" );
document.write( "s = kr^2 where k is the proportionality constant<BR>\n" );
document.write( "we are given<BR>\n" );
document.write( "64 = k(2^2)<BR>\n" );
document.write( "k = 64/4 = 16<BR>\n" );
document.write( "now we are asked to find s when r is 5<BR>\n" );
document.write( "s = 16(5^2)<BR>\n" );
document.write( "s = 16 * 25 <BR>\n" );
document.write( "s = 400<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );