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LuckyWell [14K]
3 years ago
15

A rock from the moon contains 12.5 percent of the potassium-40 it began with. how old is the rock

Chemistry
1 answer:
My name is Ann [436]3 years ago
4 0
1.25 billion years ago,2.5 billion years ago, 3.75 years ago,and 5 billion years ago.
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