document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1001329>Question 1001329</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Do I have these formulas correct?\r<BR>\n" );
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document.write( "Radioactive decay formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%28t%29+=+A%280%29+e%5E%28-kt%29 ALIGN=MIDDLE  ALT=\"+A%28t%29+=+A%280%29+e%5E%28-kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Radioactive half-life formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%28t%29+=+A%280%29%281%2F2%29%5E%28t%2Fh%29+ ALIGN=MIDDLE  ALT=\"+A%28t%29+=+A%280%29%281%2F2%29%5E%28t%2Fh%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Exponential decay formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%28t%29+=+A%280%29e%5E%28-kt%29+ ALIGN=MIDDLE  ALT=\"+A%28t%29+=+A%280%29e%5E%28-kt%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Exponential growth formula: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+A%28t%29+=+A%280%29e%5E%28kt%29+ ALIGN=MIDDLE  ALT=\"+A%28t%29+=+A%280%29e%5E%28kt%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Also, Is the formula for radioactive decay the same as the formula for exponential growth?\r<BR>\n" );
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document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #618574 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=618574\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Decay,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=A%5B0%5De%5E%28-kt%29 ALIGN=MIDDLE  ALT=\"A=A%5B0%5De%5E%28-kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, showing the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0 ALIGN=MIDDLE  ALT=\"0\"   DISABLED_style= \"max-width:90%; height:auto;\" > as a subscript;<BR>\n" );
document.write( "The negative sign in the exponent is to help show that your equation is meant for decay, and this assumes  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k%3E0 ALIGN=MIDDLE  ALT=\"k%3E0\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Use the equation, or the format for either exponential decay or for radioactive decay, or any exponential continuous decay.\r<BR>\n" );
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document.write( "Exponential Growth,  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=A%5B0%5De%5E%28kt%29 ALIGN=MIDDLE  ALT=\"A=A%5B0%5De%5E%28kt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "You may choose to say  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%28t%29 ALIGN=MIDDLE  ALT=\"A%28t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > as the function name, for A being a function of t.\r<BR>\n" );
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document.write( "The half-life (for exponential decay) can be easily found picking <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B0%5D=1 ALIGN=MIDDLE  ALT=\"A%5B0%5D=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >  and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=1%2F2 ALIGN=MIDDLE  ALT=\"A=1%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" > and then solving for t.   Usually you have some data for t and A and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%5B0%5D ALIGN=MIDDLE  ALT=\"A%5B0%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" >  when you look for a value, because you may also want to find k. </SPAN>\n" );
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