The submarine began 240 m below sea level. If it descended 40 m every hour for three hours, we can calculate that the sub will be at 360 m below sea level. From here, the sub will rise 30 m every hour for five hours. By hour five, the sub would have already arisen 150 meters. After these 8 hours, the sub should be 210 meters below sea level.
35% off of 210 is 64.05, which will bring the total down to $145.95. If Jasmine works 50 hours, she will earn $172.50. Yes, she will have enough money to purchase the game. Hope this Helps!!