Answer: Fastest to slowest : Bike, Go kart, Skateboard,Scooter.
Explanation:
Since we have given that
Distance travelled by his skateboard = 90 feet
Distance traveled by his scooter = 1020 inches
Distance traveled by his bike = 4800 centimeters
Distance traveled by his go kart = 0.03 kilometers
As we know that

Distance traveled by his go kart = 98.4252 feet
and

Distance traveled by his bike = 157.48 feet
Similarly,

Distance traveled by his scooter = 85 feet
According to question, we have to arrange in order from fastest to slowest.
Bike, Go kart, Skateboard,Scooter.