two planes leave an airport at the same time. One plane flies 34 degrees east of north at a speed of 350 miles per hour. The second place flies 72 degrees west of north at a speed of 275 miles per hour . How far apart, to the nearest mile, are the two planes after 2 hours...i’ll mark u brainliest plz help

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.