SOLUTION: A drug is eliminated from the body through urine. Suppose that for a dose of 200 milligrams, the amount remaining in the body 4 hours later is 100 milligrams: (a) Find an exponent

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Question 1130369: A drug is eliminated from the body through urine. Suppose that for a dose of 200 milligrams, the amount remaining in the body 4 hours later is 100 milligrams:
(a) Find an exponential model that gives the amount of medicine left in the body after t hours.
(b) For the drug to remain effective for the patient at least 40mg must remain in the body. With that in mind after how many hours should the patient be given the next dose?
Please show me how you got the answer, thank you.

Answer by josgarithmetic(39617) About Me  (Show Source):