document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=874078>Question 874078</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half-life of a radioactive isotope is 7 years. Initially, there are 100 grams of the isotope. Which expression shows the amount of the isotope remaining after x years? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #527284 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=527284\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q(x) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Q%5B0%5De%5E%28-kx+%29 ALIGN=MIDDLE  ALT=\"Q%5B0%5De%5E%28-kx+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "ln(.5)/-7 = k = .099<BR>\n" );
document.write( "Q(x) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=100e%5E%28-.099x%29+ ALIGN=MIDDLE  ALT=\"100e%5E%28-.099x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );