Question 699981
If a certain radioactive substance with initial mass of 100 milligrams disintegrates at the rate of 4% per year , how may milligrams would be left after 2 years?
:
Let A = amt after two yrs
:
A = 100*(1-.04)^2
A = 100*.96^2
A = 100*.9216
A = 92.16 mg