the half-life of polonium-218 is 3.0 minutes. what percentage of the original sample remains after 4 half-lives?

Answer 1

amount left= (1/2)^4=1/2^4=1/4^2=1/16

Answer 2

The half-life of polonium-218 is 3.0 min. If you start with 16 mg of
polonium-218, how much time must pass for only 1.0 mg to remain?

Answer 3

nohonob