document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=315745>Question 315745</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The intensity (I) of a light source is inversely proportional to the square of the distance (d) from the source. If the intensity is 8 lumens at a distance of 6 m, what is the intensity when the distance is 4 m? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #225890 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=225890\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The intensity (I) of a light source is inversely proportional to the square of the distance (d) from the source. <BR>\n" );
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document.write( "I = k/d^2<BR>\n" );
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document.write( "If the intensity is 8 lumens at a distance of 6 m, <BR>\n" );
document.write( "Find \"k\":<BR>\n" );
document.write( "8 = k/6^2<BR>\n" );
document.write( "k = 8*36 = 288<BR>\n" );
document.write( "----<BR>\n" );
document.write( "Equation for Your Problem:<BR>\n" );
document.write( "I = 288/d^2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "what is the intensity when the distance is 4 m?<BR>\n" );
document.write( "I = 288/4^2<BR>\n" );
document.write( "I = 18 lumens<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "------------------------------------ </SPAN>\n" );
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