Question 456220
The half-life of silicon-32 is 710 years.
 If 30 grams is present now, how much will be present in 100 years?
:
The radioactive decay formula: A = Ao*2^(-t/h); where
A = resulting amt after t time
Ao = initial amt (t=0)
t = time of decay
h = half-life of the substance
:
A = 30*2^(-100/710)
Find 2^(-10/71) on a calc
A = 30*.906988
A = 27.210 grams left after 100 yrs