he function a = –2x2 + 8x + 5 models the altitude a in feet of a ball thrown in the air and the horizontal distance in feet that the ball travels. Which is the vertex form of the function? (i just need part b answer)

he function a 2x2 8x 5 models the altitude a in feet of a ball thrown in the air and the horizontal distance in feet that the ball travels Which is the vertex f class=