Biology, 26.10.2021 19:50 oryunnis

A rock contains 48 milligrams of a radioactive element. After 200 years, only 12 milligrams of the element remains in the rock. What is the half-life of the element?

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A rock contains 48 milligrams of a radioactive element. After 200 years, only 12 milligrams of the e...

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