The amount of chicken the cafeteria uses is directly proportional to the number of
servings of Southwest Chili it makes. If
20 kilograms of chicken makes 220 servings
of Southwest Chili, how many servings can
be made with 35 kilograms of chicken?

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.