document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=235145>Question 235145</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half-life of a certain radioactive substance is 15 years. <BR>\n" );
document.write( "Suppose that at time t = 0, there are 29 g of the substance. <BR>\n" );
document.write( "Then after t years, the number of grams of the substance remaining will be <BR>\n" );
document.write( " <BR>\n" );
document.write( "How many grams of the substance will remain after 45 years? <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173364 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=173364\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The half life formula<BR>\n" );
document.write( "A = Ao(2^(-t/h))<BR>\n" );
document.write( "Where<BR>\n" );
document.write( "A = resulting amt after t yrs<BR>\n" );
document.write( "Ao = initial amt<BR>\n" );
document.write( "h = half-life of substance<BR>\n" );
document.write( ":<BR>\n" );
document.write( "The half-life of a certain radioactive substance is 15 years.<BR>\n" );
document.write( "Suppose that at time t = 0, there are 29 g of the substance.<BR>\n" );
document.write( "Then after t years, the number of grams of the substance remaining will be:<BR>\n" );
document.write( "A = 29(2^(-t/15))<BR>\n" );
document.write( ":<BR>\n" );
document.write( "How many grams of the substance will remain after 45 years?<BR>\n" );
document.write( "A = 29(2^(-45/15))<BR>\n" );
document.write( "A = 29(2^-3)<BR>\n" );
document.write( "A = 29*.125<BR>\n" );
document.write( "A = 3.625 grams  </SPAN>\n" );
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