Drug Concentration When a drug is injected into the bloodstream of a patient through the right arm, the drug concentration in the bloodstream of the left arm t hours after the injection is approximated by C(t) = at t² + b for some values a and b. Lab tests show that those values for Artecoadipine are a = 0.31 and b = 3.84, for 0 < t < 24. hours The model suggests that after injection, the drug concentration of Artecoadipine in the left arm is increasing until some time I hours, and decreasing afterward. Find T. Round to 2 decimal places.

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