document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=678210>Question 678210</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two concentric circles have circumferences 30pi & 40pi. Find the area of the ring-shaped between them.\r<BR>\n" );
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document.write( "What are my steps to solving this problem? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #421227 by </B><A HREF=/tutors/aboutme.mpl?userid=pmatei><B>pmatei(79)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=pmatei><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=421227\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Step 1: Find the radius of each circle.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%5B1%5D+=+30%2Api ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%5B1%5D+=+30%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >                  \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5B1%5D+=+15 ALIGN=MIDDLE  ALT=\"r%5B1%5D+=+15\"   DISABLED_style= \"max-width:90%; height:auto;\" >                                 \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Api%2Ar%5B2%5D+=+40%2Api ALIGN=MIDDLE  ALT=\"2%2Api%2Ar%5B2%5D+=+40%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%5B2%5D+=+20 ALIGN=MIDDLE  ALT=\"r%5B2%5D+=+20\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Step 2: Find the areas of the 2 circles.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B1%5D+=+pi%2Ar%5B1%5D%5E2+=+225%2Api ALIGN=MIDDLE  ALT=\"A%5B1%5D+=+pi%2Ar%5B1%5D%5E2+=+225%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B2%5D+=+pi%2Ar%5B2%5D%5E2+=+400%2Api ALIGN=MIDDLE  ALT=\"A%5B2%5D+=+pi%2Ar%5B2%5D%5E2+=+400%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Step 3: Subtract the smaller circle area from the bigger circle area.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5Bring%5D+=+A%5B2%5D+-+A%5B1%5D+=+175%2Api ALIGN=MIDDLE  ALT=\"A%5Bring%5D+=+A%5B2%5D+-+A%5B1%5D+=+175%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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