Answer:
A
Explanation:
1. You have the following function that is shown in the problem above:
f(x)=(x+3)/30
2. Then, the domain of the function f(x)=(x+3)/30 is:
All the real numbers (R)
3. Therefore, the correct answer for the exercise is the first option (Option A), which is:
A. x is the set of all real numbers.