Answer:She earns $9 per hour
Explanation:
Shelia works 8 hours per day Monday, Wednesday, and Friday. This means she works a total of 8×3 = 24 hours for Monday, Wednesday and Friday
She also works 6 hours a day on Tuesday and Thursday. This means that she works for a total of 6×2 = 12 hours on Tuesday and Thursday.
Total hours worked for the week will be sum of hours worked on Monday, Tuesday, Wednesday, Thursday and Friday. It becomes
24 + 12 = 36 hours
She earns $324 per week. The amount that she earns in a week will be
Total amount earned in a week/total number of hours worked in the week. It becomes
324/36 = 9
She earns $9 per hour