The function g(t) = -16t2 + vt + h represents the height of an object, g, in feet above the ground in relation to the time, t, in seconds, since the object
was thrown into the air with an initial velocity of v feet per second at an
initial height of h feet.

A model rocket is launched off the ground at an initial velocity of 80 feet per
second.

Write a function that can be used to describe the flight of the
model rocket.