Question

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each day. If you begin with 129 mg of Bismuth-210, how much remains after 6 days?

Answer 1

Answer:

It's either 64.29629877 or 55.93777992

If eat decays at the end of each day and you begin with the Bismuth-210 at the start of the day, you end up with 64.29629877 mg left.

If it decays as soon as you get it, you'll have 55.93777992 mg left.

Step-by-step explanation: