If a storm is 7.5 kilometers away, how much time is expected between observations of lightning and thunder? Round your answer to one decimal place. seconds

Time for the sound of thunder to reach the observer is: t=s/v where s is the path of the sound and v is the velocity of sound.

s=7.5 km=7500 m

v=340 m/s

t=7500/340=22.0 s

Time T for the light from the lightning to reach the observer is T=s/c where s is the path of the light and c is the speed of light.

s=7500 m, the same as for the sound

c=3*10^8 m/s

T=7500 / (3*10^8) = 2.5*10^-5 s

The expected time for the sound to reach the observer is t=22.0 s and the expected time for the light to reach the observer is T=2.5*10^-5 s.

The answer on edge is 22.7!