Please help me with this answer I am trying to get my highschool diploma

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]

Need solving this 2nd limit problem.

Triangle dog was rotated to create triangle d'o'g'. describe the transformation using details and degrees.