Aship at position (1, 0) on a nautical chart (with north in the positive y direction) sights a rock at position (6, 5). what is the vector joining the ship to the rock? (this is called the bearing of the rock from the ship. round your answer to two decimal places.) answer should be in radians east of north

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.