Question

A radioactive gas with a half life of 2.4 days accidentally leaks into a room. If the radiation level is now 25% above a safe amount for how long should the room be emptied?

Answer 1

1.00 = (1.25)e^(-0.693)(2.4)t
1.00/1.25 = e^(-1.6632)t
0.8 = e^(-1.6632)t
t = 0.135 days = 3 hrs 15 min

Answer 2

@amistre64 please confirm

Answer 3

im not sure what a safe amount of radiation is to be able to determine that

Answer 4

the problem says that's all the information i need to solve. that's how i got confused.