Simplify approach rate formulas.md

[Esnos33]

Formulas in approach rate can be simplified by using equivalent transformations to much easier to understand form.

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[peppy]

I dunno, this doesn't do much for me.

[Esnos33]

Instead of two tables there is only one table, formulas are easier to calculate in mind and it is clear when hitcircles fade in to 100%, I thought this is better.

[peppy]

I'm open to other opinions, but this differs from how we've always written this internally. I personally prefer not having constants change per instance.

[TicClick]

I agree with the fade-out edit, but would like to keep initial formulas as well -- while becoming easier to calculate, they partially lose the expressiveness

[Esnos33]

If you like formulas, then maybe I can simplify formulas like this?

1200ms + 600ms * (5 - AR) / 5 -> 1200ms + 120ms * (5 - AR)
1200ms - 750ms * (AR - 5) / 5 -> 1200ms - 150ms * (AR - 5)

I really don't know why you need / 5

[TicClick]

@peppy would that be fine by you?