Ascale model of an ancient egyptian pyramid is 29 centimeters high, with a base length of 46 centimeters. the height of the real pyramid is 145 meters. what is the base length of the real pyramid? enter your answer, in simplest form, in the box.

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.