Think of what you said . . .The path of a golf ball can be modeled by a quadratic equation.
The path of a ball hit an angle of 10° can be modeled by:
where is the height in meters and is the horizontal distance.
a) What is the maximum height reached by the ball?
The answer is 20m.
Usually I would just sub in 0 for d to find h. . . Why?
You let .
The ball has not moved yet.
What is its height?
. . Obviously it's still on the ground!
Here's one way of looking at it:
The graph of is a down-opening parabola:
Its maximum is at its vertex.
The vertex is at: .
The maximum height is: . m.