What is the percent of increase from 55 to 66?

PLEASE HURRY

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale

What graph represents an even function