Use the function from question #14 to solve: Water fills a community pool steadily all day, at a constant rate of 2.3 feet of water each hour. After 4 hours of attempting to fill the pool, the lifeguard turns the water off. If the pool was completely empty 4 hours ago, how much water is in the pool now?
8.12 feet
9.20 feet
6.30 feet
13.20 feet