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If the half life of radioactive group of atoms is 100 years then how old is the rock if there have been two half lives

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Answer:

If the half life of radioactive group of atoms is 100 years then how old is the rock if there have been two half lives

Step-by-step explanation:

If the half life of radioactive group of atoms is 100 years then how old is the rock if there have been two half lives

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