A toy rocket was launched from the ground. The function f(x) = -6x^2 + 160x shows the height of the rocket f(x), in feet, from the found at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?
~ x=810; it takes 10 sec. to reach the max. height and 10 sec. to fall back to the ground.
~ x=10; it takes 10 sec. to reach the max. height and 20 sec. to fall back to the ground.
~ x=5; it takes 5 sec. to reach the max. height and 10 sec. to fall back to the ground.
~ x=5; it takes 5 sec. to reach the max. height and 5 sec. to fall back to the ground

Question

A toy rocket was launched from the ground. The function f(x) = -6x^2 + 160x shows the height of the rocket f(x), in feet, from the found at time x seconds. What is the axis of symmetry of the graph of f(x), and what does it represent?
~ x=810; it takes 10 sec. to reach the max. height and 10 sec. to fall back to the ground.
~ x=10; it takes 10 sec. to reach the max. height and 20 sec. to fall back to the ground. 
~ x=5; it takes 5 sec. to reach the max. height and 10 sec. to fall back to the ground.
~ x=5; it takes 5 sec. to reach the max. height and 5 sec. to fall back to the ground

anonymous · Answer

Can anyone help?