Answer: 11. 5 hours
Explanation:
Let x be the number of hours Esmeralda rents the car.
According to the given statement , the expression for the total xepnediture on renting the car :-

Since, she has $144 available to spend on a car rental such that

To find x, first we subtract 52 from both the sides , we get

Hence, the greatest number of hours which she rents the car = 11.5