A quadratic function models the height, in feet, of an object above the ground in terms of the time, in seconds, after the object was launched. According to the model, the object was launched from a height of feet and reached its maximum height of feet seconds after it was launched. Based on the model, what was the height, in feet, of the object seconds after it was launched?
Enter a number or fraction, e.g. 5, 0.5, 1/2
Explanation
Vertex form: (maximum at ). Launch height . Then