Question: At a time t hours after it was administered, the concentration of a drug in the body is f(t) = 27e 0.14t ng/ml. What is

At a time t hours after it was administered, the concentration of a drug in the body is f(t) = 27e^−0.14t ng/ml. What is the concentration 4 hours after it was administered? At what rate is the concentration changing at that time?

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