Use the given quadratic function to answer questions about the situation it models. 3. A cannonball is fired into the air with an initial vertical velocity of 128 feet per second. The release point is 6 feet above the ground. The function $h = -16t^2 + 128t + 6$ represents the height h (in feet) of the cannonball after t seconds. (a) Find the height of the cannonball each second after it is fired. (b) Use the graph of the model to determine how long the cannonball is in the air.
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