Question

The monthly revenue of a digital magazine from each user is represented by f(x) = 2x+15. The monthly cost to provide the digital magazine to each user per month is represented by g(x) = x2. Which of the following evaluates the profit function for each user of the digital magazine after 3 months?
(f – g)(3) = (2(3) + 15) – 32 = 21 – 9 = $12
(g – f)(3) = 32 – (2(3) + 15) = 9 – 21 = −$12
(f + g)(3) = (2(3) + 15) + 32 = 21 + 9 = $30
(g – f)(3) = 32 – 2(3) + 15 = 9 – 6 + 15 = $18

Answer 1

F(x) is what they gain, and g(x) is what they lose. Therefore, it would be (f-g)(3) or first choice