Biology
Biology, 07.04.2020 03:21, alysonmariefont

An igneous rock that originally contained 100 grams of radioactive potassium-40 now contains 25 grams of potassium-40. What is the age of this rock?

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An igneous rock that originally contained 100 grams of radioactive potassium-40 now contains 25 gram...

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