A competitive cliff diver jumps into water 81 feet below. The distance d that the diver falls
in t seconds is given by the equation d = 16t^2. How
long does it take the diver to hit the water?

2.25 seconds

Step-by-step explanation

Because you know what distance equals you can plug it into the equation

From there you can solve by dividing the 16 over and then square rooting.

You take the square-root to get rid of