Math 3 Quiz
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ALGEBRA & FUNCTIONS
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The concentration of a drug in blood follows C(t)=20e−0.4t+5e−0.1tC(t) = 20e^{-0.4t} + 5e^{-0.1t} mg/L, where tt is hours after injection. At what time is the rate of concentration decrease exactly half of the initial rate?
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