Who wants me i really need somone in my life

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

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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.