Point P on the coordinate grid below shows the location of a stage light. A second stage light is 8 units above P. The length of each square on the grid is 2 units. What are the coordinates of the location of the second stage light? A. (4, 6) B. (4, −10) C. (12, 6) D. (12, −10)

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.