Order the set of numbers from least to greatest

3/5, 3/10, 2/7, 1/4

Standard deviation of 19,29,21,22,23

If the probability of an event happening is 65% then the probability this event does not occur?

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).