SOLUTION: please help me solve this ASAP .. If a certain radioactive substance with initial mass of 100 milligrams disintegrates at the rate of 4% per year , how may milligrams would be lef

Question 699981: please help me solve this ASAP ..
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 ?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
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
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