Ind the average speed of a horse that traveled east for 25 km in 4 hours. a) 6.25 km/h due east b) 6.25 km/h c) 62.5 km/h due east d) 62.5 km/h

the answer would be a

6.25 km/h due east

d they tend to lose electrons and become cations.

explanation:

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me