document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=925599>Question 925599</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi!!!!! I tried attempting this really hard problem on a homework assignment and I have no clue what i'm doing wrong, it's a half life question and i keep getting the wrong sort of answer, I hope you're ready :D \"An accident in 1986 at Cherynobyl play in the Ulraine released a large amount of plutonium (Pu-239) into the atmosphere. The half-life of Pu-239 is about 24,110 years.\r<BR>\n" );
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document.write( "a) Find the decay constant<BR>\n" );
document.write( "b) Use the function N(t) = N0e^-kt to find what remains of an initial 20 grams of Pu-239 after 5000 years.<BR>\n" );
document.write( "c) How long will it take for these 20 grams to decay to know gram? Go down to the Years, Days, Hours, Minutes, and Seconds.. I got A! so that won't be a problem, maybe you could try and solve it too? I got a weird number for b - 17.3? Is that odd? I mean... isn't it supposed to go down? And what's the nonsese with c? Any help at all would be great, thanks sO much!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #782251 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=782251\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "a) find the decay constant<br><BR>\n" );
document.write( "Use the general equation and the fact that a sample decays to half its original in 24110 years.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F2+=+e%5E%28-24110k%29 ALIGN=MIDDLE  ALT=\"1%2F2+=+e%5E%28-24110k%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28.5%29+=+-24110k ALIGN=MIDDLE  ALT=\"ln%28.5%29+=+-24110k\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k+=+ln%28.5%29%2F-24110+=+-.00002875 ALIGN=MIDDLE  ALT=\"k+=+ln%28.5%29%2F-24110+=+-.00002875\"   DISABLED_style= \"max-width:90%; height:auto;\" > to 4 significant figures<br><BR>\n" );
document.write( "b) find how much remains of 20g after 5000 years<br><BR>\n" );
document.write( "Use the formula with the value of k you found.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20%2Ae%5E%28-.00002875%2A5000%29+=+17.322 ALIGN=MIDDLE  ALT=\"20%2Ae%5E%28-.00002875%2A5000%29+=+17.322\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The statement of part c) makes no sense grammatically, so there is no way to know what the intended question was....<br><BR>\n" );
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