The half-life of a certain radioactive material is 38 days. An initial amount of the material has a mass of 497 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 4 days. Round your answer to the nearest thousandth.

Answer 1

A(t) = 497*(1/2)^(t/38)
You can see that when t grows by 38, you multiply again by 1/2
now plug in t=4

Answer 2

Y=497(1/2)^1/38x;462.029 kg
I’m pretty sure
I’m taking the test right now and this is my answer