Please only answer if your certain it will mean a lot I can give extra points or brain list if you like or a thanks please don’t put anything Radom or a lie thank you

Answer:
Ms. Cortez earns 500 dollars for working 30 hours. It's the last choice.
Step-by-step explanation:
You just have to substitute 30 into the equation in place of x, since x represents hours.
f(30) = 50 + 15(30)
f(30) = 50 + 450
f(30 = 500