Use the Pythagorean theorem to find the distance on the coordinate plane. a2 + b2 = c2 What is the distance between the two points? StartRoot 20 EndRoot StartRoot 40 EndRoot StartRoot 45 EndRoot StartRoot 58 EndRoot points (-1,4) and (-4,-3)

With: label the vertices and all the elements needed. find x

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.

Abcd is a square. what is the measure of angle bac