Question

The half-life of Po-210 is 140 days. If the initial mass of the sample is 5

kg, how much will remain after 420 days.

Answer 1

0.625kg

Explanation:

an equation can be made given by the detials of the problem

f(n)=5(0.5)^(x/140)

where x is the amount of days

plug in 420 for x to get

0.625