Answer: 7.7 hours
Explanation:
Since she already has 345 dollars, we can subtract that amount from the total:
1500-345= 1155
So now you take you use your new total, and make a formula to divide it by 150 (the number of dollars made every hour):
1155=150h
(divide both sides by 150)
7.7=h
She needs to work 7.7 hours.