Question is in the image, there's two parts btw
h will be ground level = 0 when the ball comes down
0 = -16t^2 + 60 t + 3 Quadratic formula shws t = 15/8 +- sqrt (237)/8 <====== throw out the negative 't' value
find h when t = 6.6
h = -16(6.6)^2 + 60 (6.6) + 3 I'll let you finish....