Suppose a 600 milligram dose of a drug is injected into a patient and that the patient's kidneys remove 20% of the drug from the bloodstream every hour. Let D(n) denote the amount of the drug left in the patient's body after n hours.(a) Find an expression for D(n).(b) How long will it take for the drug level to drop below 200 milligrams?
(c) How long will it take to bring the drug level below 10% of the original dosage?

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The Answer of Suppose a 600 milligram dose of a drug is injected into a patient and that the patient's kidneys remove 20% of the drug from the bloodstream every hour. Let D(n) denote the amount of the drug left in the patient's body after n hours.(a) Find an expression for D(n).(b) How long will it take for the drug level to drop below 200 milligrams?
(c) How long will it take to bring the drug level below 10% of the original dosage?

Suppose a 600 Milligram Dose of a Drug Is Injected