document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=416652>Question 416652</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I set this up so I can solve it, it's a word proble. <BR>\n" );
document.write( "An anthropologist studying the bones of a prehistoric person finds there is so little remaining Carbon-14 in the bones that instruments cannot measure it. This means there is less than 0.5% of the amount of Carbon-14 the bones would have contained when the person was alive. How long ago did the person die? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #291874 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=291874\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An anthropologist studying the bones of a prehistoric person finds there is so little remaining Carbon-14 in the bones that instruments cannot measure it.<BR>\n" );
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document.write( "This means there is less than 0.5% of the amount of Carbon-14 the bones would have contained when the person was alive. <BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "How long ago did the person die?<BR>\n" );
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document.write( "Carbon 14 half-life is 5730 years<BR>\n" );
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document.write( "Equation to use:<BR>\n" );
document.write( "A(t) = Ao(1/2)^(t/5730)<BR>\n" );
document.write( "0.0005Ao = Ao(1/2)^(t/5730)<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "(1/2)^(t/5730) = 0.0005<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Take the ln of both sides:<BR>\n" );
document.write( "(t/5730)ln(1/2) = ln(0.0005)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "t/5730 = 10.9658<BR>\n" );
document.write( "t > 62,833.94 year old<BR>\n" );
document.write( "========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );