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the half-life of 234U, uranium-234, is 2.52 x 10^5yr. If 98.5% of thee uranium in the original sample is present, what length of time (to the nearest thousand years) has elasped

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    The half-life of 234U, uranium-234, is 2.52 105 yr. If 98.5% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

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