If the original activity of a radioactive sustance is A0 and M is its activity after t and if its half-life is T, then the following relation holds good
A = A0`(1/2)^(t//T)`
A = A0`(1/2)^(T//t)`
A = A0(2)t/T
A = A0`(t/P)^2`
The answer must be in logarithm, right?
t/T=10/3*log(Ao/M)