Answer:
5 hours
Explanation:
1. Subtract the 13$ she made from tips from the total of $53.
2. $53 - $13 = $40
3. Since she makes $8 per hour you have to divide the $40 dollars she made by the $8 she makes per hour to get how many hours she worked.
4. 40 / 8 = 5
5 hours