A popular video game retailer develops apps. The total revenue, in dollars per day, after x days can be modeled by the function R(x) = 2x3 + 11x2 – 23x – 14. The total cost, in dollars per day, after x days, can be modeled by the function C(x) = 7x2 + 15x + 26. After how many days does the retailer start making money?
a. 2
b. 1
c. 5
d. 4