Juan is organizing textbooks on his bookshelf. He three textbooks. How many different ways can he line the textbooks up on his bookshelf?

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.

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

The measure of angle 0 is 600 degrees