Answer:
[tex]F(t)=f(t)+g(t)[/tex] represents the TOTAL revenue at time [tex]t[/tex].
Explanation:
[tex]f(t)[/tex] is the revenue at the time [tex]t[/tex] at the first restaurant.
[tex]g(t)[/tex] is the revenue at the time [tex]t[/tex] at the second restaurant.
If we want to know the TOTAL revenue at the time [tex]t[/tex], we would sum these quantities:
TOTAL revenue = [tex]f(t)+g(t)[/tex]
So [tex]F(t)=f(t)+g(t)[/tex] represents the TOTAL revenue at time [tex]t[/tex].