Question

Plutonium-32 has a half-life of 14.2 days. After 99.4 days, how much of what was originally a 499.2 gram sample remains?

14 grams

3.9 grams

35.7 grams

0.71 grams

Answer 1

3.9 gm remains

Step-by-step explanation:

499.2 ( 1/2)^(99.4/14.2) = 3.9 gm