Answer:
36(5) + 0.5(1.8)
Explanation:
Since the car rental company charges $36 per day, and she drove for 5 days, we have to start the expression with 36(5). To get how much it costs for 180 miles, we have to continue the expression with 0.50(1.8), so it can count 100 miles for 0.50 and the rest of the 80 in 0.8. :)