The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 8 days. Round your answer to the nearest thousandth.

Question

anonymous · Answer

Well after 42 days you have half the original element. Just set up a ratio for the days to get the  quantity after 8 days.

anonymous · Answer

ok thanks