Answer:
2.5 seconds.
Step-by-step explanation:
h(t) = -4t^2 + 20t
= -4(t^2 - 5t)
Convert to vertex form by completing the square:
h(t) = -4[(t - 2.5t)^2 - 6.25]
= -4(t - 2.5)^2 + 25 <--------- vertex form
So the vertex is at the point (2.5, 25).
So the athlete reaches the maximum height ( of 25 feet), after 2.5 seconds.
Answer:
260
Step-by-step explanation:
A = bh
Answer:
The correct answer is B
Step-by-step explanation:
.. .........
Answer:
can't see question
Step-by-step explanation:
IDK
