A cylindrical tank 184 inches wide had an initial depth of 11ft of water. If a pump has a capacity of 9 gallons per minute, what is the height of water inside the tank after 4 hours of pumping?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)