document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1052586>Question 1052586</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half-value of radium is 1590 years. in how many years will one grams of pure element lose one centigram </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #667924 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=667924\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A centigram is (1/100) of a gram<BR>\n" );
document.write( "(1/2)^n=0.99; n log(1/2)=log (0.99)<BR>\n" );
document.write( "-n log (2)=log (0.99)<BR>\n" );
document.write( "-0.30103n=-0.00436<BR>\n" );
document.write( "n=0.00436/0.30103<BR>\n" );
document.write( "n=0.1448 half lives<BR>\n" );
document.write( "0.0145*1590=23.03 years<BR>\n" );
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document.write( " </SPAN>\n" );
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