SOLUTION: A radioactive material has a half-life of 3 minutes. if you begin with 512000 radioactive atoms, approximately how many would you expect to have after 12 minutes

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Question 1052588: A radioactive material has a half-life of 3 minutes. if you begin with 512000 radioactive atoms, approximately how many would you expect to have after 12 minutes
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Twelve minutes is 4 half-lives.
That leaves 1/16 of the original amount (1/2)^4.
32,000 radioactive atoms would be left, 1/16*512,000.