The point A(x, y) is reflected across the x-axis to point B. Point B is reflected across the y-axis.
What are the coordinates of point B?
OA) (x, y)
OB) (-x, y)
Oc) (x,-Y)
OD (-X, -y)

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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.

Can someone answer this question for me