1. The problem statement, all variables and given/known data Determine how old is a fossile where a 14C/12C ratio of 6.1 x 10^-13 is measured. 14C desintegration has a half-life of 5760 +- 40 years and proportion 14C/12C in living tissue is 1.17 x 10^-12. Determine the error in your calculation. 2. Relevant equations Radioactive decay equation N=N0 exp(-kt/T) 3. The attempt at a solution If N0= 1.17x10^-12 N = 6.1x10^-13 k= 0.693 T = 5800 or 5720 Solving in the equation gives t= 5451 years for 5800 half-life and t= 5376 years for 5720 half-life. But inst supposed to be more years than the half-life of 14C?????? I dont understand please help me.