Write an expression for the firms profit in terms

Question

Problem

1. A firm produces a good which it can sell any amount of at £12 per unit. Its costs are a fixed outlay of £6,000 plus £9 in variable costs for each unit produced. Write an expression for the firm's profit in terms of the number of units produced.

2. Evaluate the expression 2x³ + 4x when x = 6.

3. Evaluate the expression (6x + 2y)y² when x = 4.5 and y = 1.6.

The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.