Final answer:
The height of Ana above the water at the time of diving is 15 meters.
Step-by-step explanation:
The given function h(x) = -5(x+1)(x-3) models the height (in meters above the water) of Ana at time x seconds after diving. To find the height of Ana above the water at the time of diving, we need to substitute x=0 into the function.
Plugging in x=0 into the function, we get:
h(0) = -5(0+1)(0-3)
h(0) = -5(1)(-3)
h(0) = -5(-3)
h(0) = 15
Therefore, the height of Ana above the water at the time of diving is 15 meters.