Chemistry, 14.02.2020 04:24, soph10131

A rock is believed to have been formed 1.25 billion years ago, as calculated by using potassium-40 dating. If the half-life of potassium-40 is 1.25 billion years, what percentage of the original amount of potassium-40 was found in this sample of rock?

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A rock is believed to have been formed 1.25 billion years ago, as calculated by using potassium-40 d...