document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1198829>Question 1198829</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the average rate of change of the function A(X)=piX^2, where A is the area of a circle with radius X as the radius changes from X=4 to X=7.\r<BR>\n" );
document.write( "\n" );
document.write( "The correct answer is one of the following. Which one is it?\r<BR>\n" );
document.write( "\n" );
document.write( "A) 4pi\r<BR>\n" );
document.write( "\n" );
document.write( "B) 7pi\r<BR>\n" );
document.write( "\n" );
document.write( "C) 11pi\r<BR>\n" );
document.write( "\n" );
document.write( "D) 16pi </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #832481 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52798)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=832481\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "\r\n" );
document.write( "Calculate A(4);  then calculate A(7),\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "then get the average change as  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28A%287%29-A%284%29%29%2F%287-4%29 ALIGN=MIDDLE  ALT=\"%28A%287%29-A%284%29%29%2F%287-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r\n" );
document.write( "</PRE>\r<BR>\n" );
document.write( "\n" );
document.write( "Happy calculations (!)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Everything in this assignment can be done mentally.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );