Megan has a bag of beads. she uses 28 beads to make each necklace. she makes 12 necklaces. megan has 135 beads left over.

27 is what percent of 108? 27 is % of 108

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

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.