document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=311473>Question 311473</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a 20-ft by 40-ft swimming pool is surrounded by a deck d feet wide. What is the area of the deck? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222812 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222812\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     a 20-ft by 40-ft swimming pool is surrounded by a deck d feet wide. What is the area of the deck?<BR>\n" );
document.write( ".<BR>\n" );
document.write( "\"area of pool and deck\" - \"area of pool\"<BR>\n" );
document.write( "(2d+20)(2d+40) - (20)(40)<BR>\n" );
document.write( "4d^2+80d+40d+800 - 800<BR>\n" );
document.write( "4d^2+120d+800 - 800<BR>\n" );
document.write( "4d^2+120d<BR>\n" );
document.write( "4d(d+30) (square feet)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );