Need answer fast what is the midpoint of the line segment whose endpoints are (-8, 12) and (-13, -2)? (-10.5, 5) (-10.5, 7) (-2.5, 7)

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

What is the slope of any line parallel to the line 8x+9y=3 in the standard (x,y) coordinate plane?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?