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A moon rock collected by a U.S. Apollo mission is estimated to be 4.40 billion years old by uranium/lead dating. Assuming tha

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& Given, ty = 4.4.7 x 100 years K = 0.693 . 09•693_ ty24.47%209 given time t= 4.40 billim = 4.408 109 years 280- 320 Pb Mütc

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