APPLICATIONS The height of an object that is traveling through the air can be well modeled by a quadratic function that opens downward. An object is fired upward and its height in feet above the ground is given by: 6. h(1)--16r + 64t + 80 where the input, r, is the time, in seconds, the object has been in the air (a) Using your calculator, sketch a graph of the object's height for all times where it is at or above the ground. 160 140 120 (b) What is its maximum height in feet? 100 80 60 (c) At what time does it hit the ground? 40 20 3 4 Time, t, seconds 2. 6. (d) Over what time interval is its height increasing? Height above the ground, h, in feet

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