document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=100911>Question 100911</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Cesium 13 is a radioactive element with a half life of 30 years. Predict how much of a 60mg sample of cesium137 would remain after 210 years.  I am trying to figure out the formula to solve this Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #73488 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=73488\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 210 years is 210/30 or 7 half-lives ... x=60((1/2)^7) ... x=0.46875mg\r<BR>\n" );
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document.write( "if A is the original amount, r is the amount remaining, t is the time , and h is the half-life ... r=A((1/2)^(t/h)) </SPAN>\n" );
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