Answer: After 3.75 seconds
Explanation:
For a Quadratic function in the form
, if
then the parabola opens downward.
Rewriting the given function as:
You can identify that
Since
the the parabola opens downward.
Therefore, we can conclude that the x-coordinate of the vertex is the time in seconds in which the ball will reach the maximum height. You can find it with this formula:
Substitute values, we get