document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1007283>Question 1007283</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Express the A area of a circle as a function of its circumference C. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #623218 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=623218\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since C = 2(pi)r and A = (pi)r^2, let's solve for r in the first one and plug it in to the second...we get<BR>\n" );
document.write( "r = C / 2pi<BR>\n" );
document.write( "so that<BR>\n" );
document.write( "A = (pi)(C / 2(pi))^2 = C^2 / 4(pi) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );