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6. Imagine you found a rock with the uranium-bearing mineral uraninite. You analyze the rock and find that 75% of the original Uranium-235 has decayed

6. Imagine you found a rock with the uranium-bearing mineral uraninite. You analyze the rock and find that 75% of the original Uranium-235 has decayed into Lead-207. How old is the rock? Show your work 6. Imagine you found a rock with the uranium-bearing mineral uraninite. You analyze the rock and find that 75% of the original Uranium-235 has decayed into Lead-207. How old is the rock? Show your work

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