Question

The half-life of a radioactive kind of molybdenum is 3,500 years. How much will be left after 7,000 years, if you start with 63,720 grams of it?

Answer 1

`m=63720\cdot((1)/(2))^{(7000)/(3500)}=63720\cdot((1)/(2))^2=(63720)/(4)=15930gr`