Answer:
13
Step-by-step explanation:

Hope this helps.
Todd needs to save $90.75 per month to reach his goal
28 people going.....3 vans and 1 car....8 people per van
if there is 8 people per van, and there is 3 vans....8 * 3 = 24 people take the vans......leaving 28 - 24 = 4 people taking the car <==