Posted by juliet on .
solve the problem. the halflife of 234U, uranium234, is 2.52 multiplied by 105 yr. If 98.3% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?

math 
Reiny,
see this
http://www.jiskha.com/display.cgi?id=1311013577
just change the numbers.