18 1/2 percent turn into a fraction help asap pls

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

The pyramid shown has a square base that is 24 centimeters on each side. the slant height is 16 centimeters. what is the lateral surface area?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)