document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=982035>Question 982035</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An anthropologist finds bone that her instruments measure it as  0.364% of the amount of Carbon-14 the bones would have contained when the person was alive. How long ago did the person die? <BR>\n" );
document.write( "The half life of carbon 14 is 5,730 years. Round your answer to the nearest thousand.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #602917 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=602917\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 100% of C-14 content, t years ago<BR>\n" );
document.write( "0.364% of C-14 content, today\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=ne%5E%28-kt%29 ALIGN=MIDDLE  ALT=\"y=ne%5E%28-kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "y, percent of original content after time t<BR>\n" );
document.write( "n, original content at start<BR>\n" );
document.write( "k, a constant depending on how the decay behaves<BR>\n" );
document.write( "t, time since n<BR>\n" );
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document.write( "Goal is solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t ALIGN=MIDDLE  ALT=\"t\"   DISABLED_style= \"max-width:90%; height:auto;\" > according to problem description.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28y%29=ln%28n%29-kt ALIGN=MIDDLE  ALT=\"ln%28y%29=ln%28n%29-kt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28y%29-ln%28n%29=-kt ALIGN=MIDDLE  ALT=\"ln%28y%29-ln%28n%29=-kt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=kt=ln%28n%29-ln%28y%29 ALIGN=MIDDLE  ALT=\"kt=ln%28n%29-ln%28y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=%281%2Ft%29%28ln%28n%2Fy%29%29 ALIGN=MIDDLE  ALT=\"k=%281%2Ft%29%28ln%28n%2Fy%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-------You will use this;<BR>\n" );
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document.write( "also,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%281%2Fk%29ln%28n%2Fy%29 ALIGN=MIDDLE  ALT=\"t=%281%2Fk%29ln%28n%2Fy%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-------and you will use this.\r<BR>\n" );
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document.write( "The half-life information gives <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=ln%282%29%2F5730=0.000121 ALIGN=MIDDLE  ALT=\"k=ln%282%29%2F5730=0.000121\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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