document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=330009>Question 330009</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rock is dropped in a pond and the ripples form circles in the water. if the area of each ripple is increasing at a rate of 20 square centimeters per second, then how fast is the radius changing when the radius is 5 centimeters </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #236470 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=236470\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A rock is dropped in a pond and the ripples form circles in the water. if the area of each ripple is increasing at a rate of 20 square centimeters per second, then how fast is the radius changing when the radius is 5 centimeters<BR>\n" );
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document.write( "A = pi(r^2)<BR>\n" );
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document.write( "dA = 2pi(r)dr<BR>\n" );
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document.write( "20 = 2pi(5)dr<BR>\n" );
document.write( "dr = 2/pi cm per second<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============== </SPAN>\n" );
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