The activity of a radioactive sample drops from to in

PHYSICS · Single correct · CBSE · Physics · Nuclei · Nuclei

Problem

The activity of a radioactive sample drops from

6400\,\text{Bq}

400\,\text{Bq}

30\,\text{days}

. What is the half-life of the sample? (a)

10.8\,\text{days}

(b)

7.5\,\text{days}

(c)

15\,\text{days}

(d)

17\,\text{days}