Step-by-step explanation:
s = -4.9t² + 49t
The vertex of the parabola is at t = -b/(2a).
t = -49 / (2 × -4.9)
t = 5
The rocket reaches its maximum height after 5 seconds.
Answer:
63.4
Step-by-step explanation:
9 yards I’m sorry if it’s wrong
Answer:
i think that it is oil
Step-by-step explanation:
because it does not change
