Question: A 325 mg aspirin has a half-life of H hours in a patient's body.
(a) How long does it take for the quantity of aspirin in the patient's body to be reduced to 162.5 mg? To 81.25 mg? To 40.625 mg? (Note that 162.5 = 325/2, etc. Your answers will involve H.)
(b) How many times does the quantity of aspirin, A mg, in the body halve in t hours? Use this to give a formula for A after t hours.