1. The half-life of morphine in the human bloodstream is 3 hours. Suppose there is initially 0.4 mg of morphine in the bloodstream.   (a) Determine an equation for m(t), the amount of morphine in the bloodstream at time t, assuming that the amount decays at a rate proportional to its size. Simplify your final equation. (b) (b) How long will it take for the amount to drop below 0.01 mg? Round your answer to the closest hour.

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