Answer:
4 hours
Explanation:
For Pham to maximize her income, she must consider the jobs with the highest per-hour earnings first. She has 15 hours to work. Her priorities should be as below.
Work at the cafe for 6 hours for $15 per hour
Work at the garage for 5 hours for $13 per hour
Work at the books store for 4 hours for $12 per hour
A total of 15 hours. Pham can work at the book store for 4 hours per week to maximize her income.
might be wrong srry