It is given to us that the monthly revenue of a digital magazine from each user is represented by f(x) = 3x + 9.
It is also given to us that the monthly cost to provide the digital magazine to each user per month is represented by g(x) =
![x^(2)](https://img.qammunity.org/2019/formulas/mathematics/high-school/x18wowxes8du7ezs6fltwoqbv6i8lovbjg.png)
Now, we know that Profit is always given by:
Profit = Revenue - Cost
Therefore, from the above formula and the given data we can evaluate the profit for each user as:
Profit=
![(3x+9)-x^2](https://img.qammunity.org/2019/formulas/mathematics/high-school/1lkh7pf4l1cwn90xgmgsd8mjgd177vcuw9.png)