The height h (in feet) of a projectile can be modeled by h=-16²+vt+s

where t is the time (in seconds) and v is the initial velocity (in feet per second) and s is the initial height (in feet)

If a started armadillo jumps straight into the air with an initial vertical velocity of 14 feet per second, how many seconds does it take to land on the ground?

AND

If a penguin jumps out of the water while swimming at 4.5 feet per second, how many seconds does it take to land on the ground?