Answer:
6.41 ft
Step-by-step explanation:
Equation is y=ax^2
y=15
x=16.5
15=a(16.5)^2
a=0.055
So, to get depth at 4 ft from edge, I assume my new x value is 12.5.
Derived from 16.5 - 4 = 12.5
So:
y= 0.055 * (12.5)^2
y = 8.59
To get depth, I assume subtract from center depth of 15ft.
15ft - 8.59ft = 6.41ft
Answer is 6.41ft.
