During nuclear explosion, one of the products is`""^(90_(Sr))` with half-life of 28.1 years. If 1µg of
`""^(90_(Sr))` was absorbed in the bones of a newly born baby
instead of calcium, how much of it will remain after 10 years and
60 years if it is not lost metabolically.

Explanation

`t(2.303)/(k)xx"log"(R^(0))/(R ),k=(0.693)/(t_(1//2))`