Question

A toy rocket was launched from the ground. The function f(x) = -16x^2 + 160x shows the height of the rocket f(x), in feet, from the ground at time x seconds.

Answer 1

x = 10; it takes 10 seconds to reach the maximum height and 10 seconds to fall back to the ground

x = 10; it takes 10 seconds to reach the maximum height and 20 seconds to fall back to the ground

x = 5; it takes 5 seconds to reach the maximum height and 10 seconds to fall back to the ground

x = 5; it takes 5 seconds to reach the maximum height and 5 seconds to fall back to the ground