document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=797491>Question 797491</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The intensity I of light varies inversely as the sqaure of the distance D from the source. If the intensity of illumination on a screen 5ft from a light is 4 foot candles, find the intensity on a screen 20ft from the light.\r<BR>\n" );
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document.write( "Please help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #481836 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=481836\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The intensity I of light varies inversely as the square of the distance D from the source.<BR>\n" );
document.write( " If the intensity of illumination on a screen 5 ft from a light is 4 foot candles,<BR>\n" );
document.write( "let k = constant, then I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k%2FD%5E2 ALIGN=MIDDLE  ALT=\"k%2FD%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Find K<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k%2F5%5E2 ALIGN=MIDDLE  ALT=\"k%2F5%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 4<BR>\n" );
document.write( "k = 25*4<BR>\n" );
document.write( "k = 100<BR>\n" );
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document.write( "find the intensity on a screen 20ft from the light. <BR>\n" );
document.write( "I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100%2F20%5E2 ALIGN=MIDDLE  ALT=\"100%2F20%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100%2F400 ALIGN=MIDDLE  ALT=\"100%2F400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F4 ALIGN=MIDDLE  ALT=\"1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" > foot candle </SPAN>\n" );
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