1. The problem statement, all variables and given/known data An archaeologist finds an oak wine cask in one of her digs. Testing the activity from the radioactive carbon-14 in the cask reveals that it is only one-quarter that of the activity coming from the modern sample of the same type of oak. How old is the sample? 2. Relevant equations A=Anaught(.5)^(t/t1/2) 3. The attempt at a solution I tried finding the halflife of carbon-14 (which is 5.73EXP3a) from a chart given in my textbook. after that, i tried filling int he blanks for my equation above, but i just didnt know how to formulate it.