Final answer:
The domain of this function is 12 < x < 25.
Step-by-step explanation:
The domain of a function represents the set of all possible values for the independent variable in that function. In this case, the independent variable is the number of hours Fernando works, denoted by x. The function t(x) = 9.50x represents the amount of money Fernando earns given the number of hours he works.
Since Fernando works between 12 and 25 hours each week, the domain of this function would include all values of x between 12 and 25, inclusive. Therefore, the statement that best represents the domain of this function for any given week is: C) 12 < x < 25.