Question

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.

Answer 1

1) Gathering the data

half-life: 32 days

Initial Amount: 361 kg

how much after:5 days

2) We can write a half-life exponential equation this way, and plugging into that the given values: