About _ % of the area is between z=-1.6 and z=1.6

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

Using the figure below, select the two pairs of alternate interior angles. a: point 1 and point 4 b : point 2 and point 3 c: point 6 and point 6d: point 5 and point 7