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11-62.

The height (in feet) of object A after seconds is given by the equation . The height of object B is given by the graph at right.

  1. Which object was in the air longer? How long was this object in the air?

    Find the -intercepts for object A to determine how long it was in the air.

    Object A was in the air for seconds.

  2. Which object traveled higher? How high did it travel?

    Average the -intercepts for object A to find the vertex.

  3. For what times is the height of object A higher than feet?

    Solve

  4. In the context of this problem, what domain is reasonable for the function that describes object A?

    For what values of is the ball on or above the ground?