document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1033859>Question 1033859</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A radioactive isotope has a decay rate of 2% per year. Calculate the half life for this isotope, using the exact half-life formula </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #648543 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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/cgi-bin/show-face.mpl?user=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=648543\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The model to use is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+m%5B0%5D%2A0.98%5Et ALIGN=MIDDLE  ALT=\"m+=+m%5B0%5D%2A0.98%5Et\"   DISABLED_style= \"max-width:90%; height:auto;\" >where m is the mass remaining after t years, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%5B0%5D+ ALIGN=MIDDLE  ALT=\"m%5B0%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the original mass of the substance.\r<BR>\n" );
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document.write( "To find the half-life, set <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+m%5B0%5D%2F2 ALIGN=MIDDLE  ALT=\"m+=+m%5B0%5D%2F2\"   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=m%5B0%5D%2F2+=+m%5B0%5D%2A0.98%5Et ALIGN=MIDDLE  ALT=\"m%5B0%5D%2F2+=+m%5B0%5D%2A0.98%5Et\"   DISABLED_style= \"max-width:90%; height:auto;\" > ==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F2+=+0.98%5Et ALIGN=MIDDLE  ALT=\"1%2F2+=+0.98%5Et\"   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=t+=+-ln2%2Fln0.98+=+34.3 ALIGN=MIDDLE  ALT=\"t+=+-ln2%2Fln0.98+=+34.3\"   DISABLED_style= \"max-width:90%; height:auto;\" >years. </SPAN>\n" );
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