Question 638910
The half-life of a certain radioactive material is 32 days.
 An initial amount of the material has a mass of 361 kg.
 Write an exponential function that models the decay of this material.
 Find how much radioactive material remains after 5 days.
 Round your answer to the nearest thousandth.
:
The radio active decay formula: A = Ao*2^(-t/h); where
A = remaining amt after t time
Ao = initial amt
t = time of decay
h = half-life of the substance
:
A = 391*2^(-5/32)
using a calc find 2^(-5/32)
A = 391 * .89735
A = 350.866 kg