The concentration C of a chemical in the bloodstream t hours after injection into the muscle tissue is given by

C=(3t²+ t)/ (t³+30)

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a)Determine the horizontal asymptote of the function and interpret the meaning in the context of the problem.

b)Use a graphing calculator to graph the function and approximate the time when the bloodstream concentration is greatest.

c)Use the graphing calculator to determine when the concentration is less than 0.345.

Include a picture of your graphing calculator results for parts b) and c).