document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=37723>Question 37723</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The intensity, I, of light received from a source varies inversely as the square of the distance, d, from the source.  If the light intensity is 2 foot-candles at 11 feet, find the light intensity at 19 feet.  Round your answer to the nearest hundredth if necessary. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23407 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=23407\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We express this relationship as <BR>\n" );
document.write( "I = k/d^2<BR>\n" );
document.write( "Plug in to find k<BR>\n" );
document.write( "k = Id^2 = 2(11^2) = 242<BR>\n" );
document.write( "Now find I for this k and a different d...<BR>\n" );
document.write( "I = k/d^2 = 242/19^2 = 242/361<BR>\n" );
document.write( "I = .67 foot-candles </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );