What is the approximate volume of a cylindrical tube that is 7 inches long has a diameter of 2 inches?

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.

What is the answer to this problem? ignore the work. what is the correct answer?

2pointswhat is the best next step in the construction of the perpendicular bisector ofab?