document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=374179>Question 374179</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A radioactive substance decats by 5% every hour. Intially rhere are 500g of substance. \r<BR>\n" );
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document.write( "a. How many grams remain after 6 hours?\r<BR>\n" );
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document.write( "b. What is the half life substance?\r<BR>\n" );
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document.write( "c. How long will it take the 500g to decay to 200g? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #266336 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=266336\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation to use is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%28t%29+=+500e%5E%28-0.05t%29 ALIGN=MIDDLE  ALT=\"x%28t%29+=+500e%5E%28-0.05t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "a.<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++x%286%29+=+500e%5E%28-0.05%2A6%29+=+500e%5E-0.3+=+370.409 ALIGN=MIDDLE  ALT=\"++x%286%29+=+500e%5E%28-0.05%2A6%29+=+500e%5E-0.3+=+370.409\"   DISABLED_style= \"max-width:90%; height:auto;\" >grams.<BR>\n" );
document.write( "b.  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=250+=+500e%5E%28-0.05t%29 ALIGN=MIDDLE  ALT=\"250+=+500e%5E%28-0.05t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.5+=+e%5E%28-0.05t%29 ALIGN=MIDDLE  ALT=\"0.5+=+e%5E%28-0.05t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, which gives <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln0.5+=+-0.05t ALIGN=MIDDLE  ALT=\"ln0.5+=+-0.05t\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+ln0.5%2F-0.05+=+13.86 ALIGN=MIDDLE  ALT=\"t+=+ln0.5%2F-0.05+=+13.86\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours.<BR>\n" );
document.write( "c.  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=200+=+500e%5E%28-0.05t%29 ALIGN=MIDDLE  ALT=\"200+=+500e%5E%28-0.05t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > implies that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.4+=+e%5E%28-0.05t%29 ALIGN=MIDDLE  ALT=\"0.4+=+e%5E%28-0.05t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln0.4+=+-0.05t ALIGN=MIDDLE  ALT=\"ln0.4+=+-0.05t\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+ln0.04%2F-0.05+=+18.33 ALIGN=MIDDLE  ALT=\"t+=+ln0.04%2F-0.05+=+18.33\"   DISABLED_style= \"max-width:90%; height:auto;\" > hours. </SPAN>\n" );
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