A river flows due east at 2.20 m/s. A boat crosses the river from the south shore to the north shore at a speed of 13.0 m/s due north relative to the water. What is the velocity of the boat as viewed by an observer on the shore?
how many degrees east of north does the boat appear to move to an observer in a helicopter above the river

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d