document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1089642>Question 1089642</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A circular field contains 10 acres.  Determine length of fence to enclose the field.\r<BR>\n" );
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document.write( "Area of circle; pi * r^2.\r<BR>\n" );
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document.write( "Circumference of circle; pi * diameter.\r<BR>\n" );
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document.write( "Acre = 43560 sq. ft.\r<BR>\n" );
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document.write( "Not sure how to proceed.  Non-homework. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #703985 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=703985\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font color=\"black\" face=\"times\" size=\"3\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10_acres+=+%2810_acres%29%2A%28%2843560_sq_ft%29%2F%281_acre%29%29 ALIGN=MIDDLE  ALT=\"10_acres+=+%2810_acres%29%2A%28%2843560_sq_ft%29%2F%281_acre%29%29\"   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=10_acres+=+435600_sq_ft ALIGN=MIDDLE  ALT=\"10_acres+=+435600_sq_ft\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "note how the \"acres\" units cancel. \r<BR>\n" );
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document.write( "There are 435600 sq ft in 10 acres\r<BR>\n" );
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document.write( "The area of the circular field is 435600 square feet\r<BR>\n" );
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document.write( "Use this area value to find the radius\r<BR>\n" );
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document.write( "Area of circle = pi*(radius)^2<BR>\n" );
document.write( "A = pi*r^2<BR>\n" );
document.write( "435600 = pi*r^2<BR>\n" );
document.write( "435600/pi = (pi*r^2)/pi<BR>\n" );
document.write( "435600/pi = r^2<BR>\n" );
document.write( "r^2 = 435600/pi<BR>\n" );
document.write( "sqrt(r^2) = sqrt(435600/pi)<BR>\n" );
document.write( "r = 372.365125 ... use a calculator for this step\r<BR>\n" );
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document.write( "The radius of the circle is approximately 372.365125 feet\r<BR>\n" );
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document.write( "Now that we know the radius, we can compute the circumference C\r<BR>\n" );
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document.write( "C = 2*pi*r<BR>\n" );
document.write( "C = 2*pi*372.365125<BR>\n" );
document.write( "C = 2,339.639082 ... use a calculator for this step\r<BR>\n" );
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document.write( "------------------------------\r<BR>\n" );
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document.write( "You'll need roughly 2,339.639082 feet of fencing\r<BR>\n" );
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document.write( "Rounded to the nearest whole number, you'll need 2,340 feet of fencing\r<BR>\n" );
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document.write( "</font>  </SPAN>\n" );
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