Distance between Cytie and city be is 250 miles. On a certain wall map, this is represented by a length of 1.7 feet. On the map, how many feet would there be between city city and city D, two cities that are actually 550 miles apart?

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.