Advanced Placement (AP), 20.12.2020 01:50 sierraaasifuent

A sample of radioactive waste has a half-life of 30 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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A sample of radioactive waste has a half-life of 30 years and an activity level of 2 curies. After h...