SOLUTION: The core melt- down and explosions at the nuclear reactor in Chernobyl in 1986 released large amounts of strontium-90, which decays exponentially at the rate of 2.5% per year. Area

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Question 1125234: The core melt- down and explosions at the nuclear reactor in Chernobyl in 1986 released large amounts of strontium-90, which decays exponentially at the rate of 2.5% per year. Areas downwind of the reactor will be uninhabitable for 100 years. What percent of the original strontium-90 contamination will still be present after:
a. 50 years?
b. 100 years?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
0.975^50 for 50 years leaves 0.2820 or 28.2% left
0.975^100 for 100 years 0.0795 or 7.95% left