document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42307>Question 42307</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0201755262/algebrahomeworkh>College Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Colombian Earthquake of 1906    At 8.6 on the richter scale, the Colombian earthquake of January 31, 1906, was one of the strongest earthquakes on record.  Use the formula log(I)-log(Io) to write I as a multiple of Io for this earthquake. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27587 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=27587\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> log(I)-log(Io) = <BR>\n" );
document.write( "log (I/Io) = 8.6<BR>\n" );
document.write( "I/Io = 10^8.6<BR>\n" );
document.write( "I/Io = 398107170.6<BR>\n" );
document.write( "Since we are given only two significant figures, our best answer is<BR>\n" );
document.write( "I = 400000000*Io </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );