document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1138147>Question 1138147</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The half life of Erbrium-165 is 10.4 hours. What is the hourly decay rate? Express the decimal result to four significant digits and the percentage to two significant digits. How old is the artifact? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #756059 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</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=756059\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "part 1....<br><BR>\n" );
document.write( "If x is the fraction REMAINING after each hour and the half-life is 10.4 hours, then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E%2810.4%29+=+.5 ALIGN=MIDDLE  ALT=\"x%5E%2810.4%29+=+.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10.4%2Alog%28%28x%29%29+=+log%28%28.5%29%29 ALIGN=MIDDLE  ALT=\"10.4%2Alog%28%28x%29%29+=+log%28%28.5%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=log%28%28x%29%29+=+log%28%28.5%29%29%2F10.4+=+-.0289452 ALIGN=MIDDLE  ALT=\"log%28%28x%29%29+=+log%28%28.5%29%29%2F10.4+=+-.0289452\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+10%5E%28-.0289452%29+=+.93552373 ALIGN=MIDDLE  ALT=\"x+=+10%5E%28-.0289452%29+=+.93552373\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Then the hourly decay rate is<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-.93552373+=+.06447627 ALIGN=MIDDLE  ALT=\"1-.93552373+=+.06447627\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "Round the answers as directed....<br><BR>\n" );
document.write( "part 2....<br><BR>\n" );
document.write( "You didn't give any information about an artifact.... </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );