Does anyone know the answer to question 15?

Answer:
d. They are the same.
Step-by-step explanation:
Assuming the equation is supposed to be ...
g(x) = 19x +5
Then
g(4) = 19·4 +5 = 76 +5 = 81
And ...
f(4) = 3^4 = 81
Both g(4) and f(4) have the same value.