A plane flies 35 km in the direction N 30° W, then flies 60 km in the direction N 60° E.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Ineed if you could explain and give me the answer you! this needs done

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.