To get from km/hr to m/s you divide by 3.6 and to get from m/s to km/hr you multiply by 3.6 . Sorry I can't explain why it's just on my formula sheet but it is right because it wouldn't be on my exam formula sheet if it wasn't ;)
I’m not 100% sure but it could be the theroarocal flame of the degrees times bu
BR means breaking bad on a periodic table