5. A product is sold for $25/unit. Variable costs per unit are $18, and total fixed costs are $840,000. How many units must be sold in order to earn a profit of at least $200,000? (2 marks) Chapter 2 6. State the domain of each of the following functions: (3 marks) (a) f(x) = (b) g(x) = v5x - 3 + +1 (c) h(@)= 2 _ Gr + 5 7. For functions (7 marks) f(x) = 4x2 - 12, -7 + 2 h(x) = -2r(r + 3) find: (a) f(3) (b) 9(-2) (c) f(x - 3) (d) h(-3) (e) g(a + 3) (f ) f ( v/2 ) (g) : f( eth) - f(x) h