avier is at NASA analyzing Moon rocks. In one of the rocks from the lunar Maria, he discovered 80% of the original uranium-238 remains, while remaining amount of uranium-238 had decayed into lead. The half life of uranium-238 is 4.5 x 109 years. Assume the only decay product is lead. How old is the lunar Maria rock in billions of years (109 years) ?
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Xavier is at NASA analyzing Moon rocks. In one of the rocks from the lunar Maria, he discovered 80% of the original uranium-238 remains, while remaining amount of uranium-238 had decayed into lead. The half life of uranium-238 is 4.5 x 109 years. Assume the only decay product is lead. How old is the lunar Maria rock in billions of years (109 years) ?
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