Question

lodine-123 is a radioactive isotope used in medicine to test the function of the thyroid gland. Its half-life is 13.1 hours. A 475-microcurie (ci) dose of iodine-123 is administered to a patient. The quantity, Q. left in the body after thours is given by the equation Q 41 Answer parts (a) through (d). (a) Determine the time it takes for the level of iodine-123 to drop to 40 ICI. It takes hr for the level of iodine-123 to drop to 40 Ci. (Type an integer or decimal rounded to two decimal places as needed.)

questions:

a) Determine the time it takes for the level of Iodine-123 to drop to 40 microCurie.

b) Determine the rate of change of the quantity of Iodine-123 at 12 hours.

(c) Determine the rate of change of the quantity of Iodine-123 at 1 day.

(d) Determine the rate of change of the quantity of Iodine-123 at 2 days. What do your answers say about the rate at which iodine decreases as time increases