Question: The function A(d) gives the pain level on a scale of 0 to 10 experienced by a patient with d milligrams of a pain- reducing

The function A(d) gives the pain level on a scale of 0 to 10 experienced by a patient with d milligrams of a pain- reducing drug in her system. The milligrams of the drug in the patient’s system after t minutes is modeled by m(t). Which of the following would you do in order to determine when the patient will be at a pain level of 4?

a. Evaluate A(m(4)).

b. Evaluate m(A(4)). 

c. Solve A(m(t)) = 4.

d. Solve m(A(d)) = 4.

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