Biology, 24.05.2020 04:00 ponylover9558

A rock sample contains 25 percent k-40 and 75 percent daughter product ar-40. if k-40 has a half-life of 1.3 billion years, how old is the rock?

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A rock sample contains 25 percent k-40 and 75 percent daughter product ar-40. if k-40 has a half-lif...