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:
-7
Step-by-step explanation:
Train A weighs 181 tons and train B weighs 70 tons.
Ms. Alonzo received 400 markers because one tenth of 4000 is 400. Hope this helped!