Answer:
24
Step-by-step explanation
bruh...
1. Divide 140 by 6 and you get 23.3 repeating
2. When you multiply 23 times 6 you get 138. (not enough seats)
3. So, you would need to have at least 24 cars in order for everyone to go on the trip. (24 x 6 = 144 seats)