document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=725094>Question 725094</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A sample of 800 grams of radioactive substance decays according to the function A(t)=800e^-0.028t, where t is the time in years . How much of the substance will be left in the sample after 10 years? Round to the nearest whole gram.<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 #443965 by </B><A HREF=/tutors/aboutme.mpl?userid=jsmallt9><B>jsmallt9(3758)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jsmallt9><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=443965\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Just replace the t with 10 and enter it into your calculator. If your calculator has buttons for parentheses and for the number e, you could enter the whole expression at once:<BR>\n" );
document.write( "800*(e^(-0.028*10))<br><BR>\n" );
document.write( "If there is no button for \"e\" then use ln^(-1)(1) or 2.7182818284590452353602874713527 (or a rounded off version of this).<br><BR>\n" );
document.write( "If there are no buttons for parentheses then raise e to the -0.28 power (since (-0.028 * 10 = -0.28) and then multiply by 800.<br><BR>\n" );
document.write( "And last, round the answer you get to the nearest whole number. </SPAN>\n" );
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