Question: state how many polonium-218 atoms Jonathon has after: 4min:
14min:
9min:
19min:

Second question (if you want to answer it would really help me)
Question: Determine the time(min) when Jonathon has:
A) one-half of the original number of polonium-218 atoms
B) one-quarter of the original number of polonium-218 atoms
C) one-eighth of the original number of polonium-218 atoms