how much of a 50 gram sample of gold is left over after 10.8 days if its half-time is 2.70 days?
A = 50 2^-(10.8/2.7)
A=50 . 0.0625
A=3.125 grams left after 10.8 days.
P.S. It is called "half-life" NOT "half-time".
