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Diagnostic scanning Iodine-123 is a radioactive isotope used in medicine to test the function of the thyroid gland. If a 350-microcurie (μCi) dose of iodine-123 is administered to a patient, the quantity Q left in the body after t hours is approximately
- a. How long does it take for the level of iodine-123 to drop to μCi?
- b. Find the rate of change of the quantity of iodine-123 at 12 hr, 1 day, and 2 days. What do your answers say about the rate at which iodine decreases as time increases?
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