1.In what percent of the arrangements are the vehicles separated by an empty parking space? 2.In what percent of the arrangements are the vehicles parked next to each other?

3.In what percent of the arrangements does the left or right parking space remain vacant?

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).