What is Stacey's speed if she goes 40.5m in 5.6s?

Speed = (distance covered) / (time to cover the distance).

Her speed is exactly 40.5 meters per 5.6 seconds.

In more familiar units, (40.5/5.6) = 7.232 meters per second (rounded)

Speed is defined as the distance traveled in unit time or distance traveled divided by the total time of travel.

speed = 40.5 metres / 5.6 seconds = 7.23 meters / second

that means that Stacey moves 7.23 meters in each second.