2. A ball is thrown from a cliff, and it can be modelled by the equation h(t) = -0.5t2 + 4t + 25, where t represents the time since the ball has been thrown, in seconds, and h represents the vertical height the ball has travelled from its original location, in feet. a) From what height is the ball thrown off the cliff? = -0.5(0)+4(0)+25 for finding the height on the USC O as a X = Start I decide to +0+25 =125m Solving. At what time(s) is the ball at a height of 30 ft above the ground? /1A