In the "Related Questions" below,
the 1st, the 3rd and the 4th give solutions from 3 different tutors to the almost identical question.
Choose whichever one you like.
The half-life of 234U, uranium-234, 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?
1 answer