document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1149491>Question 1149491</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In order to determine the age of a piece of wood, the amount of carbon-14 was measured. It was determined that the wood had lost 33.1% of its carbon-14. How old is this piece of wood? </SPAN>\n" );
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document.write( "If 33.1% has been lost, 66.9% remains.  So we need to know how many half-lives have passed if 66.9% of the Carbon-14 remains.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28.5%29%5Ex+=+0.669 ALIGN=MIDDLE  ALT=\"%28.5%29%5Ex+=+0.669\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Alog%28%28.5%29%29+=+log%28%28.669%29%29 ALIGN=MIDDLE  ALT=\"x%2Alog%28%28.5%29%29+=+log%28%28.669%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+log%28%280.669%29%29%2Flog%28%280.5%29%29 ALIGN=MIDDLE  ALT=\"x+=+log%28%280.669%29%29%2Flog%28%280.5%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 0.57992... or approximately 0.58.<br><BR>\n" );
document.write( "You didn't give the half-life of Carbon-14, so we can't get a final answer.<br.<BR>\n" );
document.write( "Multiply the half-life in years by 0.58 to find the age of the piece of wood in years.<br><BR>\n" );
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document.write( "For tutor @ikleyn....<br><BR>\n" );
document.write( "Something is wrong somewhere in your calculations.  10000 years is more than the half life; 66.9% will not still remain....<br>\r<BR>\n" );
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