(fog)(x) = f[g(x)] ...................
Acute because it's keys than 90 degreses
Plug in the numbers so it will turn out as 21. Divided by 3(2) . You know that if 2 numbers are close by each other than you are going to multiply so 3 times 2 = 6 , then you do 21 divided by 6 = 3.5
The answer = 3.5