document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=561513>Question 561513</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Grace is 4 ft. tall and standing in the light of a 20 ft. tall lamppost. her shadow is 8 ft. long. If she moves 1 ft. closer to the lamppost, by how much will her shadow decrease? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #364371 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=364371\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> using similar triangles ___ 4 / 8 = 20 / (d + 8)\r<BR>\n" );
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document.write( "\"cross\" multiplying ___ 4d + 32 = 160 ___ d = 32 ___ this is the starting distance from the lamppost\r<BR>\n" );
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document.write( "4 / s = 20 / (31 + s) ___ 4s + 124 = 20s ___ 31 / 4 = s\r<BR>\n" );
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document.write( "her shadow decreases 1/4 ft or 3 in </SPAN>\n" );
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