For Problems 9 and 10, consider that when medicine is administered, reaction (measured in change of blood

Question:

For Problems 9 and 10, consider that when medicine is administered, reaction (measured in change of blood pressure or temperature) can be modeled by

Where c is a positive constant and m is the amount of medicine absorbed into the blood (Source: R. M. Thrall et al., Some Mathematical Models in Biology, U.S. Department of Commerce 1967).
Find the amount of medicine that is being absorbed into the blood when the reaction is maximum.