Can someone please explain this to me? I'm not understanding it whatsoever. This the question:
An object is said to be in free-fall when it is falling with no air resistance acting on the object. The model for the distance an object fall in t seconds is given by the equation d=4.9t2. the distance d is given in meters.
Question:

If the object is falling for 3 seconds, predict the distance the object falls. If a small amount of air resistance is present, predict what this would do to the distance the object falls.