Find 1/3u, if u=(1, -3) (1, -1) (1/3, -1) (3, -9) (1, -9)

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?