document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1202994>Question 1202994</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function A = A0e^(-0.0099x) models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault.  How many years will it be until 30% of the original amount remains in the vault?  Round off to the nearest year. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #838208 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=838208\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=ae%5E%28-0.0099x%29 ALIGN=MIDDLE  ALT=\"A=ae%5E%28-0.0099x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >  to make the text symbols easier to manage\r<BR>\n" );
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document.write( "According to question, .....,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.3=1%2Ae%5E%28-0.0099x%29 ALIGN=MIDDLE  ALT=\"0.3=1%2Ae%5E%28-0.0099x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and you want to solve for x.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%280.3%29=ln%28e%5E%28-0.0099x%29%29 ALIGN=MIDDLE  ALT=\"ln%280.3%29=ln%28e%5E%28-0.0099x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%280.3%29=-0.0099x%2Aln%28e%29 ALIGN=MIDDLE  ALT=\"ln%280.3%29=-0.0099x%2Aln%28e%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%280.3%29=-0.0099x%2A1 ALIGN=MIDDLE  ALT=\"ln%280.3%29=-0.0099x%2A1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=ln%280.3%29%2F%28-0.0099%29 ALIGN=MIDDLE  ALT=\"x=ln%280.3%29%2F%28-0.0099%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >---------and you can finish computing this... </SPAN>\n" );
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