Suppose a scientist were to drop a cannonball from the leaning tower of pisa from a height of 180 ft. which expression could be used to determine how long, in seconds, it would take the cannonball to hit the ground?

The vertical height is h = 180 ft
The acceleration due to gravity is g = 32.2 ft/s²

Let t = the time for the cannonball to hit the ground.
Because the initial vertical velocity is zero (the ball is dropped), the formula to use is
h = (1/2)gt²

That is
t = √[(2h)/g]
  = √[(2*180)/32.2]
  = 3.344 s

The formula is , and the time is  3.344 s

A., d., and f i think