Your equation is presented in by the following formula of y = mx + b
m = slope, it is the coefficient of X
y = 4/5 X - 3
m = 4/5
A chord is a line segment that goes from one side of the circle to the other without crossing the center.
The numbers from least to greatest is D=9.5x10^5
It would be 6+4, which equals 10. Then, subtract 104 ft minus 10 to get 94 ft in depth.
I think that's the side angle side similarity theorem