Find the values for x and y

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]

What is the frequency of the sinusoidal graph?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup