Question

The half-life of a radioactive kind of

cesium is 30 years. How much will be
left after 60 years, if you start with
1,800 grams of it?

Answer 1

450 gm...this is because we start with 1800/2 = 900 = 30 and 900/2 =450 = 60 yrs. = 450 gm

Explanation:

Answer 2

Every 30 years you'll have half left

After 30 years = 900 grams

after 60 years 450 grams

Explanation: