Posted by Urgen please help on .
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?
=

ALGEBRA 
Steve,
.983 = 2^(t / 2.52*10^5)
t = 6233