Which of the following is true of high clouds?

Acoyote chasing a rabbit is moving 8.00 m/s due east at one moment and 8.80 m/s due south 4.25 s later. let the x axis point due east and the y axis point due north. find the direction of the coyote's average acceleration during that time.

Could someone . i have tried to solve myself but my calculation is off

The air that we breath is made mostly of which gaseous molecule