HELP PLEASE )

Independent Events
A Weather Forecaster, predicts that their is a 50% chance of rain on
Saturday and a 40% chance of rain on Sunday. If these probabilities
are correct, what is the probability that DOESN'T rain at all on the
weekend?

20%
30%
40%
50%

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

If value of cos330° is √3/2 then find tan165°.

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).