Function Word Problems

Aaron gets a summer job where he works $40$ hours a week, and he is on call during the weekend when he's not working regular hours. When he gets called into work he gets time and a half $(1.5 \times \text{hourly rate})$. He gets paid $9$ dollars an hour. Which of the following functions represents the pay Aaron receives for the hours of work he does this week? How much will Aaron get paid if he works 47 hours in one week?