The half-lives of radioisotopes and are 14 days and 25 days

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

The half-lives of radioisotopes

^{32}\text{P}

and

^{33}\text{P}

are 14 days and 25 days, respectively. These radioisotopes are mixed in the atomic ratio

4:1

. If the initial activity of the mixed sample is

3.0\,\text{mCi}

, find the activity of the mixed isotopes after 60 years.