document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1083384>Question 1083384</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The number of grams of a certain radioactive substance present at time t is given by the formula A=200e^-0.005t, where t is the number of years. Find the number of grams that are present at time t=0 and at time t=800  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #697449 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=697449\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You have your formula:   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=200%2Ae%5E%28-0.005t%29 ALIGN=MIDDLE  ALT=\"A=200%2Ae%5E%28-0.005t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "You are given the independent variable values to use:<BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28t=0%2Cor%2Ct=800%29 ALIGN=MIDDLE  ALT=\"system%28t=0%2Cor%2Ct=800%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Make the substitutions and evaluate the result for each:\r<BR>\n" );
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document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2Ae%5E%28-0.005%2A0%29=200%2Ae%5E0=200%2A1=200 ALIGN=MIDDLE  ALT=\"200%2Ae%5E%28-0.005%2A0%29=200%2Ae%5E0=200%2A1=200\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "which is not complicated... \r<BR>\n" );
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document.write( "AND for the other, use a hand-held calculator for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200%2Ae%5E%28-0.005%2A800%29=200%2Ae%5E%28-4%29 ALIGN=MIDDLE  ALT=\"200%2Ae%5E%28-0.005%2A800%29=200%2Ae%5E%28-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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