Question

help me baby jesus

Answer 1

The formula below can be used to find the amount of radioactive material that remains after a certain period of time, where A0 is the initial amount of material, A is the amount of material remaining after t hours, and k is the decay constant.
A = A0(2.71)-kt

If Celeste has 80.8 grams of a radioactive material initially, and it has a decay constant of 0.7, how much of the material, in grams, will remain after 5 hours? Round to the nearest hundredth of a gram, if necessary.


A. 1.23

B. 2.47

C. 0.55

D. 40.21

Answer 2

A=80.8g(2.71)-(.7)(5)