Unit test test review profit is the difference between revenue and cost. the revenue, in dollars, of a company that makes skateboards can be modeled by the polynomial 2x3 + 30x – 130. the cost, in dollars, of producing the skateboards can be modeled by 2x3 – 3x – 520. the variable x represents the number of skateboards sold. what expression represents the profit?
a. 27x – 650
b. 27x + 390
c. 33x – 650
d. 33x + 390