document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=812496>Question 812496</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the half life of radium is 1690 years. if 60 grams are present now, how much will be present in 670 years? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #489175 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=489175\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Basic General Model, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=Ao%2Ae%5E%28kt%29 ALIGN=MIDDLE  ALT=\"A=Ao%2Ae%5E%28kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28A%29=ln%28Ao%29%2Bkt%2Aln%28e%29 ALIGN=MIDDLE  ALT=\"ln%28A%29=ln%28Ao%29%2Bkt%2Aln%28e%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28A%29=ln%28Ao%29%2Bkt ALIGN=MIDDLE  ALT=\"ln%28A%29=ln%28Ao%29%2Bkt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=%28ln%28A%29-ln%28Ao%29%29%2Ft ALIGN=MIDDLE  ALT=\"k=%28ln%28A%29-ln%28Ao%29%29%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=%28ln%281%2F2%29-ln%281%29%29%2F1690 ALIGN=MIDDLE  ALT=\"k=%28ln%281%2F2%29-ln%281%29%29%2F1690\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28k=-0.000952%29 ALIGN=MIDDLE  ALT=\"highlight%28k=-0.000952%29\"   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=A=60%2Ae%5E%28-0.000952%2At%29 ALIGN=MIDDLE  ALT=\"A=60%2Ae%5E%28-0.000952%2At%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=60%2Ae%5E%28-0.000952%2A670%29 ALIGN=MIDDLE  ALT=\"A=60%2Ae%5E%28-0.000952%2A670%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28A=32%29 ALIGN=MIDDLE  ALT=\"highlight%28A=32%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, close to 31.7 grams.... This is a mistake...\r<BR>\n" );
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document.write( "CHECK:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F2=1%2Ae%5E%28kt%29 ALIGN=MIDDLE  ALT=\"1%2F2=1%2Ae%5E%28kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%280.5%29=kt%2Aln%28e%29 ALIGN=MIDDLE  ALT=\"ln%280.5%29=kt%2Aln%28e%29\"   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%280.5%29 ALIGN=MIDDLE  ALT=\"kt=ln%280.5%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%2F1690%29ln%280.5%29=-0.0004101 ALIGN=MIDDLE  ALT=\"k=%281%2F1690%29ln%280.5%29=-0.0004101\"   DISABLED_style= \"max-width:90%; height:auto;\" >  as the constant k.  Believing this to be a more correct value, you should find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=60%2Ae%5E%28-0.0004101%2A670%29 ALIGN=MIDDLE  ALT=\"A=60%2Ae%5E%28-0.0004101%2A670%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28A=45%29 ALIGN=MIDDLE  ALT=\"highlight%28A=45%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, close to 45.4 grams.  The work shown above \"CHECK:\" contains a mistake. </SPAN>\n" );
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