Jeff's fish tank has a base that is a trapezoid, as shown. The bases of the trapezoid are 18 and 30 inches, and the height is 16 inches. The tank contains 23.1 gallons of water. To the nearest inch, how deep is Jeff's tank? (A gallon is 231 cubic inches.) The tank is inches in height. (Round to the nearest inch as needed.) b = 18 inches h=16 inches b = 30 inches