75. You are a geologist in the field trying to determine the age of a rock outcrop. You find that the rock has 6.25 % parent product remaining. The radioactive isotope in the rock found has a half life of 25,000 years. What is the age of the rock?

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A: we need to write down that how the distance between two objects affect their gravitional force.

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A: The answer to the above question is

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