document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1129384>Question 1129384</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The area of a circle is 3 1/7 times the square of the radius.  Find weight of a circular disc of cast iron 7 ft. in diameter and 1 1/3 in. thickness.  \r<BR>\n" );
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document.write( "A plate of cast iron 1 ft. square and 1 in. thickness weighs 37.5 lbs. \r<BR>\n" );
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document.write( "Attempt:\r<BR>\n" );
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document.write( "The disc is a cylinder.\r<BR>\n" );
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document.write( "Volume; pi * r*2 * height.  3.1416 * 3.5 * 3.5 * .1108333 = 4.265375 cu. ft.\r<BR>\n" );
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document.write( "Not sure how to continue.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #745975 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=745975\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find density of iron in pounds/cubic inch<BR>\n" );
document.write( "Volume of iron plate:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+12%2A12%2A1+=+144+ ALIGN=MIDDLE  ALT=\"+V+=+12%2A12%2A1+=+144+\"   DISABLED_style= \"max-width:90%; height:auto;\" > in3<BR>\n" );
document.write( "Density:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+37.5%2F144+=+.26042+ ALIGN=MIDDLE  ALT=\"+37.5%2F144+=+.26042+\"   DISABLED_style= \"max-width:90%; height:auto;\" > lbs/in3<BR>\n" );
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document.write( "Find volume of circular disk<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+%2822%2F7%29%2A42%5E2%2A%284%2F3%29+ ALIGN=MIDDLE  ALT=\"+V+=+%2822%2F7%29%2A42%5E2%2A%284%2F3%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > in3<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+%28+88%2F21+%29%2A1764+ ALIGN=MIDDLE  ALT=\"+V+=+%28+88%2F21+%29%2A1764+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+7392+ ALIGN=MIDDLE  ALT=\"+V+=+7392+\"   DISABLED_style= \"max-width:90%; height:auto;\" > in3<BR>\n" );
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document.write( "[ weight ] = [ density ] x [ volume ]<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+=+.26042%2A7392+ ALIGN=MIDDLE  ALT=\"+W+=+.26042%2A7392+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+W+=+1925.025+ ALIGN=MIDDLE  ALT=\"+W+=+1925.025+\"   DISABLED_style= \"max-width:90%; height:auto;\" > pounds<BR>\n" );
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document.write( "Get a 2nd opinion if needed<BR>\n" );
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