Explanation:
It is given that, a projectile is fired vertically upward from a height of 300 feet above the ground, with an initial velocity of 900 ft/s.
The general equation with which a projectile are modled by the function is given by :
y₀ is the initial height above the ground
v₀ = initial velocity
So,
This is the quadratic equation that models the projectile height in feet above the ground after t seconds.