document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=36076>Question 36076</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078279992/algebrahomeworkh>Algebra 2</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A paleontonlogist finds a bone that has 25% of the amount of carbon-14 found in living b tissue. How old is the bone? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #22152 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=22152\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A paleontonlogist finds a bone that has 25% of the amount of carbon-14 found in living b tissue. How old is the bone?\r<BR>\n" );
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document.write( "Half-life of carbon-14 is 5700 years.<BR>\n" );
document.write( "Let \"x\" be the original amount of carbon-14 in the bone.<BR>\n" );
document.write( "EQUATION:<BR>\n" );
document.write( "(1/4)x=x(1/2)^(t/5700)<BR>\n" );
document.write( "1/4= (1/2)^(t/5700)<BR>\n" );
document.write( "(1/2)^2= (1/2)^(t/5700)<BR>\n" );
document.write( "2=t/5700<BR>\n" );
document.write( "t = 11400 years.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );