A ball's height is h(t) = -16t² + 64t + 5 feet after t seconds. Rewrite the model in vertex form by completing the square, then find the maximum height and when it occurs.
Answer
h(t) = -16(t - 2)² + 69; the maximum height is 69 feet at 2 seconds.
Reasoning Strategy
Factor -16 from the quadratic and linear terms, complete the square inside, and interpret the vertex.
AI Support Preview
Check the rewritten form by expanding it before using the vertex.