K The concentration of drug in the bloodstream (in ng/mL) t hours after a single IV bolus dose is administered is given by -0.0773t C(t)=1520e0 ng/mL (a) If a dose is repeated every 4 hours, what is the concentration immediately after the 2nd dose? (b) If a dose is repeated every 4 hours, what is the concentation immediately before the 3rd dose? Enter C values as integers. (a) C₂ (0) = ng/mL (b) C₂ (4)= ng/mL C

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