document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=977781>Question 977781</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half-life of carbon-14 is 5770 years. <BR>\n" );
document.write( "a. If you start with 1 gram of carbon-14, how long will it take for only 0.25 grams to remain? <BR>\n" );
document.write( "b. Assuming that we start with 25 grams of carbon-14, find a formula that gives the amount of carbon-14 left after t years.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #599322 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=599322\">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=highlight_green%28y=p%2Ae%5E%28-kx%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28y=p%2Ae%5E%28-kx%29%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=1%2F2=1%2Ae%5E%28-k%2A5770%29 ALIGN=MIDDLE  ALT=\"1%2F2=1%2Ae%5E%28-k%2A5770%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%281%2F2%29=-k%2A5770 ALIGN=MIDDLE  ALT=\"ln%281%2F2%29=-k%2A5770\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%281%2F2%29%2F5770=-k ALIGN=MIDDLE  ALT=\"ln%281%2F2%29%2F5770=-k\"   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%281%2F2%29%2F5770 ALIGN=MIDDLE  ALT=\"k=-ln%281%2F2%29%2F5770\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28k=1.201%2A10%5E%28-4%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28k=1.201%2A10%5E%28-4%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(a):<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.25=1%2Ae%5E%28-1.201%2A10%5E%28-4%29%2Ax%29 ALIGN=MIDDLE  ALT=\"0.25=1%2Ae%5E%28-1.201%2A10%5E%28-4%29%2Ax%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%280.25%29=-1.201%2A10%5E%28-4%29%2Ax ALIGN=MIDDLE  ALT=\"ln%280.25%29=-1.201%2A10%5E%28-4%29%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=ln%280.25%29%2F%28-1.201%2A10%5E%28-4%29%29 ALIGN=MIDDLE  ALT=\"x=ln%280.25%29%2F%28-1.201%2A10%5E%28-4%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=highlight%28x=11540%29 ALIGN=MIDDLE  ALT=\"highlight%28x=11540%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "(b):<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ln%28y%29=ln%28p%29%2B%28-k%2At%29 ALIGN=MIDDLE  ALT=\"ln%28y%29=ln%28p%29%2B%28-k%2At%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%28y%29-ln%28p%29=-k%2At ALIGN=MIDDLE  ALT=\"ln%28y%29-ln%28p%29=-k%2At\"   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%28p%29-ln%28y%29 ALIGN=MIDDLE  ALT=\"kt=ln%28p%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=highlight_green%28t=%28ln%28p%29-ln%28y%29%29%2Fk%29 ALIGN=MIDDLE  ALT=\"highlight_green%28t=%28ln%28p%29-ln%28y%29%29%2Fk%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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