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Home > PC3 > Chapter 13 > Lesson 13.2.3 > Problem 13-89


A water balloon is tossed from the top of a walkway so that its height above the ground is found by where is measured in feet and is measured in seconds.

  1. When will the ball reach a maximum height?

    The given function is a parabola. Where is the vertex of this parabola?

  2. When will the ball hit the ground?

    This occurs when .

  3. Approximate the instantaneous velocity of the water balloon when it strikes the ground.