Posted by Anonymous on Tuesday, July 26, 2011 at 12:49am.
The halflife of 234U, uranium234, is 2.52 multiplied by 105 yr. If 97.4% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

math  Reiny, Tuesday, July 26, 2011 at 8:34am
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