Question

You have 320 grams of a radioactive kind of scandium. How much will be left after 132 hours if its half-life is 44 hours?

Answer 1

Answer: 40g

Explanation:

132 hours is 3 half lives (132/44 = 3)

3 half lives == 0.5^3 = 1/8 = 0.125

0.125 * 320 = 40.

40 grams are left