Read both, please. 4. Tickets to a play cost $4 in advance and $5 at the door. The theater club president wants to raise at least $400 from ticket sales. Write an inequality for the number of tickets the theater club needs to sell.

5. Using the information from problem 4, if the club sells 40 tickets in advance, what is the least number the club needs to sell at the door to reach the president's goal?