document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=692963>Question 692963</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the circumference of a circle wth radius 7 in </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #427171 by </B><A HREF=/tutors/aboutme.mpl?userid=RedemptiveMath><B>RedemptiveMath(80)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RedemptiveMath><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=427171\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The standard formula for finding the circumference of a circle is C = d * &#960; or C = 2r * &#960;, where d = the diameter, r = radius, and &#960; = a value of approx. 3.14159 or 22/7 (depending on the context of the problem). The reason we could use either formula is because twice the radius of a circle equals its diameter, or 2r = d. So, we could use either or to solve for the circumference. Using our values, we have:\r<BR>\n" );
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document.write( "C = 2r&#960;<BR>\n" );
document.write( "C = 2(7)(22/7)<BR>\n" );
document.write( "C = 14(22/7) = approx. 44 in. (43.982 in).\r<BR>\n" );
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document.write( "C = d&#960; = 14(22/7) = approx. 44 in. (43.982 in).\r<BR>\n" );
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document.write( "OR\r<BR>\n" );
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document.write( "C = 14(3.14159) = approx. 44 in. (43.982 in).\r<BR>\n" );
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document.write( "NOTE: Depending on your course, it is extremely important to note the usage of pi in these answers. I have calculated the approximate value of pi and use that in my operations. Pi is not a constant number; it is irrational (never-ending decimal). If the problem wants the EXACT answer for this, then we need to simply leave the symbol for pi in our answer:\r<BR>\n" );
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document.write( "C = 14&#960; in.<BR>\n" );
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