document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=235351>Question 235351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The surface of a balloon varies directly as the square of its radius. The area is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=314+cm%5E2 ALIGN=MIDDLE  ALT=\"314+cm%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > when the radius is 5 cm. What is the area when the radius is 10 cm? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173580 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=173580\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The surface of a balloon varies directly as the square of its radius.<BR>\n" );
document.write( " The area is  314 sq/cm when the radius is 5 cm.<BR>\n" );
document.write( " What is the area when the radius is 10 cm?<BR>\n" );
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document.write( "If it varies directly as the square, when the radius is doubled the surface area is times 4<BR>\n" );
document.write( "4 * 314 = 1256 sq/cm<BR>\n" );
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document.write( "You can check this using the surface area formula<BR>\n" );
document.write( "S.A = 4*pi*10^2 = 1256.6 </SPAN>\n" );
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