document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=45767>Question 45767</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello,\r<BR>\n" );
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document.write( "I could use some help on this problem:\r<BR>\n" );
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document.write( "A circle is shrinking in size, and the radius is given by the function r(t) = 1/(2 + t^2), where t is the time in minutes. Express the area of the circle as a function of t, and find its value when t=4 min. \r<BR>\n" );
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document.write( "After I solve the above function, do I then have to find the area by solving area=pie(r^2)?\r<BR>\n" );
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document.write( "Thanks again,<BR>\n" );
document.write( "Louis </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #30384 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=30384\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A circle is shrinking in size, and the radius is given by the function r(t) = 1/(2 + t^2), where t is the time in minutes. Express the area of the circle as a function of t, and find its value when t=4 min. <BR>\n" );
document.write( "After I solve the above function, do I then have to find the area by solving area=pie(r^2)? \r<BR>\n" );
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document.write( "You don't have to solve the function; it is already solved for \"r\".<BR>\n" );
document.write( "Just put the r value into the formula A=(pi)r^2\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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