A certain diet pill is designed to delay the administration of the active ingredient for several hours. The concentration C(t) (in mg/L) of the active ingredient in the blood stream t hours after taking the pillis modeled by 31 2 – 201 + 51 a. Use a graphing utility to graph the function. C(t): b. What are the domain restrictions on the function? c. Use the graph to approximate the maximum concentration. Round to the nearest mg/L. d. What is the limiting concentration?

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A: See the attachment

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