Solve the problem. 4x How long after the drug has been administered is the concentration a x2+25 The percent of concentration of a certain drug in the bloodstreamx hr after the drug is administered s given by K(x) = maximum? Round answer to the nearest tenth, if necessary. Select one: A. 4 hr B. 2.5 hr C.5hr D. 1.3 hr Find the largest open interval where the function is changing as requested. Decreasung y = l mcbs.proctoring.online is sharing your screen. Stop sharing Hide

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