Which answer correct?

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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.