Which ratio is equivalent to the unit rate 30 miles 1 gallon ? how was the unit rate transformed into the equivalent ratio?

What numbers are included in the set of integers? what numbers are not included?

Pls never taught i’m really confused and i rlly need

An observer(o) spots a plane(p) taking off from a local airport and flying at a 29 degree angle horizontal to her line of sight and located directly above a tower(t). the observer also notices a bird circling directly above her. if the distance from the plane(p) to the tower(t) is 6,000ft., how far is the bird(b) from the plane(p).