If r = ratio of carbon-14 to carbon-12 then, if we take r = 1 in
living material (say branch of a tree) then with the half-life of 5730
years we have:
In 5730 years the value of r is down to 1/2
So we have the equation r = (1/2)^(t/5730) where t = time in years.
With this...