Question

The charcoal from ashes found in a cave gave 3.34 14C counts per gram per minute. wood from the outer portion of a growing tree gives a comparable count of 16.0. The half life of 14C is 5700 years. How old are the ashes?

Answer 1

k = 0.693/t_1/2 = ?

Then ln(No/N) - kt
No = 16.0
N = 3.34
k from above
Solve for t in years.