1. Science

# Question: mr doe recorded an initial activity reading of 24 rads...

###### Question details

Mr. Doe recorded an initial activity reading of 24 Rads, after 60 days the current activity reading is 23.909 Rads. Calculate the half-life of the radiation source in years. Please use the following equation and please show work...I can't remember how to do this at the moment.

A(t) = A(o)*e-[0.693t/T1/2]

Where:
At = current activity (curies).
Ao = original acivity (curies).
e = 2.71828 (base of the natural logarithm system).
λ = decay constant simplified to
t = elapsed time between Ao and At.