Wrong.
Every time you use the "8 inches per mile squared" formula you're offering a parabola.
If you get a piece of graph paper and draw a graph of the result of "8 inches per mile squared", that graph will be a parabola.
Not a sphere.
Not a circle.
A parabola.
That is why we've been telling you ever since you started using the "8 inches per mile squared" rule that your formula is wrong.
Your "8 inches per mile squared" formula is not the formula of a circle.
Your "8 inches per mile squared" formula is the formula of a parabola.
YOU brought up the "8 inches per mile squared" formula originally.
WE only told you that "8 inches per mile squared" is a formula for a parabola, not for a circle, and is therefore WRONG to describe Earth's curvature because Earth is not a parabola.
I don't know how much more simply and plainly we can explain this.
Of course, you have me on ignore so you won't even see this. Or you'll pretend to ignore it so that you can lie yet again and claim that nobody has told you this information.