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Question 2. If a rhyoliticock (sample A) contains 250 out of 1000 atoms of radioactive parent atoms of Element J, how old is the rock?

Question 2. If a rhyoliticock (sample A) contains 250 out of 1000 atoms of radioactive parent atoms of Element J, how old is the rock? A. 60 million years old B. 120 million years old C. 180 million years old D. 240 million years old

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