Suppose that you go to your local dentist’s ofce to get an
x-ray of your teeth. During the x-ray, you are exposed to 0.1 gray of
high-energy x-rays. How many sieverts of radiation did you receive?
Suppose that a radioactive substance is introduced into your
body with a half-life of 100 days. What is the average life of the same
substance if it is not removed from your body by natural processes?