Absorption of Drugs The concentration of a drug in an organ at any time t (in seconds) is given by x(t) = 0.09 + 0.18(1 - -0.0291) where x(t) is measured in milligrams per cubic centimeter (mg/cm³). (a) What is the initial concentration of the drug in the organ? (Round your answer to two decimal places.) x(t) = 0.06 x mg/cm³ (b) What is the concentration of the drug in the organ after 15 sec? (Round your answer to four decimal places.) x(t) -0.1975 mg/cm³ x

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