1 A sample of radioactive waste has a half-life of 10 years and an act.pdf

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The sample has an initial activity of 2 curies and a half-life of 10 years. After x years, the activity will be 0.25 curies. Solving the exponential decay equation shows that it will take 30 years for the activity of the sample to reach 0.25 curies.

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1 A sample of radioactive waste has a half-life of 10 years and an activity level of 2 curies. After
how many years will the activity level of this sample be 0.25 curie?

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