document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196812>Question 1196812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A lab has a sample of ore containing 500 mg of radioactive material. The radioactive material has a half-life of one day, so it takes one day for half the atoms in the substance to decay.\r<BR>\n" );
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document.write( "A. Is this a geometric or arithmetic sequence?\r<BR>\n" );
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document.write( "B. Does it make a difference if you calculate the half-life at the beginning or end of the day? Explain.\r<BR>\n" );
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document.write( "C. What formula can you use to find the radioactive material in the sample at the beginning of the 7th day? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #829815 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=829815\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ----------------------------------------------------<BR>\n" );
document.write( "A. Is this a geometric or arithmetic sequence?<BR>\n" );
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document.write( "Completely obvious!\r<BR>\n" );
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document.write( "C. What formula can you use to find the radioactive material in the sample at the beginning of the 7th day?<BR>\n" );
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document.write( "Initially before any time pass, 500 mg. of the radioactive material.<BR>\n" );
document.write( "After one day (or one half-life), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%2A%281%2F2%29 ALIGN=MIDDLE  ALT=\"500%2A%281%2F2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >;<BR>\n" );
document.write( "AFTER two days (or two half-lives), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%2A%281%2F2%29%5E2 ALIGN=MIDDLE  ALT=\"500%2A%281%2F2%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >;<BR>\n" );
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document.write( "AFTER some number x days (x number of half-lives), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%281%2F2%29%5Ex ALIGN=MIDDLE  ALT=\"500%281%2F2%29%5Ex\"   DISABLED_style= \"max-width:90%; height:auto;\" > <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=mg ALIGN=MIDDLE  ALT=\"mg\"   DISABLED_style= \"max-width:90%; height:auto;\" > of material remaining.\r<BR>\n" );
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document.write( "The beginning of day 7 is same as the end of day 6, so the amount present than would be  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=500%281%2F2%29%5E6 ALIGN=MIDDLE  ALT=\"500%281%2F2%29%5E6\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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