Biology, 24.06.2019 02:00, Gabyngreen

Rubidium-87 has a half-life of 48.1 billion years. after how many years is there 25 percent parent isotope and 75 percent daughter isotope contained in the object?

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Rubidium-87 has a half-life of 48.1 billion years. after how many years is there 25 percent parent i...