Reasonable Prices For Stardoll Dkny

"theorem" of the tip

Sea x a positive real (the total of your account), and is f (x) = (9 / 10) x discount function g (y) = (1 / 10) and function tip, then:


x > f (x) + (1 / 10) f (x)


Dem.

f (x) + (1 / 10) f (x)
= (9 / 10) x + (1 / 10) (9 / 10) x
= (9 / 10) x + (9 / 100) x
= (90/100) x + (9 / 100) x
= (99/100) x

< 1 por lo tanto la afirmacion es verdadera.
99/100 on the table
This means that if you get a 10% discount on consumption and pay particular in order to cover the tip, would be giving 11% gratuity.