document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=925671>Question 925671</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the half life of radium is 1690 years if 40 grams are present now how much will be present in 250 years ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #561671 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=561671\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q[t)= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%5Bo%5De%5E%28-kt%29 ALIGN=MIDDLE  ALT=\"+Q%5Bo%5De%5E%28-kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "ln(.5)/-1690 = k = .00041<BR>\n" );
document.write( "Q(t]= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%5Bo%5De%5E%28-.0041t%29 ALIGN=MIDDLE  ALT=\"+Q%5Bo%5De%5E%28-.0041t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".......<BR>\n" );
document.write( "Q(250)=  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40e%5E%28-.0041%2A250%29 ALIGN=MIDDLE  ALT=\"40e%5E%28-.0041%2A250%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 36.0883gm </SPAN>\n" );
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