10. (06.02 MC)

The monthly revenue of a digital magazine from each user is represented by the function f(x) = 3x + 12. The monthly cost to provide the digital magazine to each user per month is represented by the function g(x) = x2. Which of the following evaluates the profit function for each user of the digital magazine after 4 months? (1 point)
(f • g)(4) = (3(4) + 12)(42) = (24)(16) = $384
(f + g)(4) = 3(4) + 12 + 42 = 24 + 16 = $40
(f − g)(4) = (3(4) + 12) − 42 = 24 − 16 = $8
(g − f)(4) = 42 − (3(4) + 12) = 16 − 24 = −$8