3. A rock falls from the top of a cliff to the ocean 100 feet below. The distance, S, the rock is from the ocean as it falls is represented by the function S(t) = -16% + 100,

where trepresents the number of seconds the rock has been falling. According to

this function, how long does it take the rock to hit the water?

2.0 seconds

2.5 seconds

5.0 seconds

6.3 seconds