Immediately following an injection, the concentration of a drug in the bloodstream is 200 milligrams per millitiler. After t hours, the concentration is 65% of the level the previous hour. a) Find a model C(t), the concentration of the drug after t hours.  C(t)= b)Determine the concentration of the drug after 3 hours. (Round your answer to the nearest whole number). ________________milligrams per millileter

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