can someone answer these 2 questions and show the working out?

A) Factor using the difference of squares formula: a^2 - b^2 = (a+b) (a-b)

a = X and B = 33

(x+33) (x-33)

b)

67^2 - 33^2 =

(67 * 67) - (33 * 33) =

4489 - 1089 = 3400

215.92 dollars is the answer

table 3 represents a direct variation function. : )