document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1104585>Question 1104585</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A radioactive substance has a half-life of 3.5 days. A scientist starts with 80 grams of the decaying substance. How much is left after 8.2 days? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #719305 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=719305\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A radioactive substance has a half-life of 3.5 days. A scientist starts with 80 grams of the decaying substance. How much is left after 8.2 days? <BR>\n" );
document.write( "A(t) = (Ao)(1/2)^(t/3.5)<BR>\n" );
document.write( "------------------<BR>\n" );
document.write( "A(t) = Ao(1/2)^(t/3.5)<BR>\n" );
document.write( "A(8.2) = 80(1/2)^(8.2/3.5)<BR>\n" );
document.write( "A(8.2) = 80(1/2)^2.343<BR>\n" );
document.write( "A(8.2) = 15.77 grams<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );