Jennie decides to randomly select which top and skirt she will wear to an interview. She has a number of white tops, blue tops, and brown tops. She has a number of black skirts, navy skirts, and gray skirts. Based on the information in the tree diagram below, order the compound events provided from least to greatest probability

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

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.

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices