A droplet of water drips from the end of a stalactite high up on the roof of a cave. The height
of the water droplet above the cave floor in meters can be modeled by the expression
22 - 4.9t², where t is the time in seconds after the water droplet begins to fall.
What does the quantity 4.9t² represent in the expression?
the distance in meters the water droplet has fallen after t seconds
the height in meters of the water droplet above the cave floor after t seconds
the time in seconds it takes for the water droplet to fall t meters
the time in seconds it takes for the water droplet to reach a height of t
meters