14/6 c has a half-life of 5600 years. An anyalsis of charcoal from a wood fire shows that 14c content is 25 per cent of living wood.

Question

how many years have passed since fire for the wood was cut

Answer 1

k = 0.693/t_1/2

Substitute the value of k into the below equation.
ln(No/N) = kt
No = 100
N = 25
k from above
Solve for t in years.

Answer 2

Yes