Solve the problem.The concentration, in parts per million, of a particular drug in a patient's blood x hours after the drug is administered is given by the function, f(x) = -x4 + 9x3 - 29x2 + 45x. How many hours after the drug is administered will it be eliminated from the bloodstream.

A. 5 hours
B. 4 hours
C. 9 hours
D. 14 hours


Answer: A

Mathematics

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