Posted by Nicole on Saturday, August 13, 2011 at 4:30pm.
Carbon14 has a halflife of about 5,600 years. Archaeologists analyze a piece of wood found at an ancient village site and determine that, of he initial 100 grams of Carbon14 in the wood, onl 3.125 grams are left. How old is the wood?

Science  bobpursley, Saturday, August 13, 2011 at 5:29pm
3.125=100(1/2)^n/thalf
take log both sides...
log(3.125)=2+n/thlaf (log.5)
so solve for n, then grab you calculator and have fun. 
Science  Anonymous, Thursday, March 5, 2015 at 3:00pm
8898