Answer:
Around 9 years or 9.3 to be exact.
Explanation:
hat If you add up 10 and 4 (the average amount of weeks in a month). She makes 40$ a month and you multiply that by 12(months in a year). Annually, she makes 480$. You divide her annual income with 4,500$ and there's your answer of how long it will take!
Hope this helps. I could be wrong!