document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058423>Question 1058423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The mass of a radioactive element at time x is given by the equation below, where c is the original mass and h is the half-life of the element. The half-life of a substance is 3.1 years. How long will it take for 50 grams to decay to 8 grams? (Round your answer to one decimal place.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673480 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=673480\">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=y=50%2Ae%5E%28-kt%29 ALIGN=MIDDLE  ALT=\"y=50%2Ae%5E%28-kt%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%28y%29=ln%2850%29-kt ALIGN=MIDDLE  ALT=\"ln%28y%29=ln%2850%29-kt\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-kt=ln%28y%29-ln%2850%29 ALIGN=MIDDLE  ALT=\"-kt=ln%28y%29-ln%2850%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=kt=ln%2850%29-ln%28y%29 ALIGN=MIDDLE  ALT=\"kt=ln%2850%29-ln%28y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=%281%2Ft%29ln%2850%2Fy%29 ALIGN=MIDDLE  ALT=\"k=%281%2Ft%29ln%2850%2Fy%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use halflife:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=%281%2F3.1%29%28ln%2850%2F25%29%29 ALIGN=MIDDLE  ALT=\"k=%281%2F3.1%29%28ln%2850%2F25%29%29\"   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%282%29%2F3.1 ALIGN=MIDDLE  ALT=\"k=ln%282%29%2F3.1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28k=0.22359%29 ALIGN=MIDDLE  ALT=\"highlight%28k=0.22359%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=kt=ln%2850%29-ln%28y%29 ALIGN=MIDDLE  ALT=\"kt=ln%2850%29-ln%28y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%281%2Fk%29%28ln%2850%2Fy%29%29 ALIGN=MIDDLE  ALT=\"t=%281%2Fk%29%28ln%2850%2Fy%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "How long to reach 8 grams?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=%281%2F0.22359%29ln%2850%2F8%29 ALIGN=MIDDLE  ALT=\"t=%281%2F0.22359%29ln%2850%2F8%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28t=ln%2825%2F4%29%2F0.22359%29 ALIGN=MIDDLE  ALT=\"highlight%28t=ln%2825%2F4%29%2F0.22359%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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