There are multiple ways to do the math, one of the most straight forward way is the divide and multiplication system.
First we must divide 9,240 by three( representing Jordan, and her two grandfathers):
9,240 ÷ 3 = 3,080
Now that we know the amount she must have in 8 year in order for her to have enlightened money after her grandfathers to match the amount, we now must divide that money by 8:
3,080 ÷ 8 = 385
Thus, Jordan must make at least $385 each year in order to have enough money to pay for her first year of college tuition.
Hope this helps! :)