Iodine-123 has a half-life of about 13 hours, emits gamma-radiation, and is readily absorbed by the thyroid.
because of these facts, it is regularly used in nuclear imaging.
a. write a formula that gives you the percent pp of iodine-123 left after t half-lives.
b. what is the decay rate per hour of iodine-123? approximate to the nearest millionth.
c. use your result to part (b). how many hours h would it take for you to have less than 1% of an initial dose of
iodine-123 in your system? round your answer to the nearest tenth of an hour.