Here is the link to do the exponential regression problems from section 4.6 #21 and #25:
 http://earthmath.kennesaw.edu/main_site/tool_chest/exp_reg.htm


A short web-address to type to get the links below is: http://hawk.ma.iup.edu/logs.html

History of Logarithms:
http://www.ualr.edu/~lasmoller/napier.html
http://pages.cpsc.ucalgary.ca/~williams/History_web_site/time%201500_1800/logarithms%20and%20slide%20rules.htm
http://michaelshepperd.tripod.com/algloghist/
http://www.csc.liv.ac.uk/~ped/teachadmin/histsci/htmlform/lect3.html
http://home.att.net/~numericana/answer/culture.htm#napier
http://www.rit.edu/~bpbsma/Slide%20Rule.htm

Applications of Logarithms:
http://asms.k12.ar.us/asms_teaching_units/Teaching_Units/Mathematics/Applications_of_the_Logarithm.htm
http://library.thinkquest.org/C0110248/algebra/isllog.htm?tqskip1=1&tqtime=1130
http://www.tpub.com/photographyadv/14.htm

http://www.duncanwil.co.uk/rule72.html
http://www.ucl.ac.uk/~uctpa36/C41_note_growth_accounting.pdf

Here's another use related to accounting: http://256.com/gray/info/benfords.html

This summary of links (above) is adapted from: http://www.blinn.edu/matheng/anglin/Logwebquest.htm More links: http://mathforum.org/library/drmath/view/52469.html http://michealshepperd.tripod.com/algloghist/ http://www.thocp.net/reference/sciences/mathematics/logarithm_hist.htm