L = 50 yards or 150 feet W = 20 yards or 60 feet H = 9 feet V = 150 * 60 * 9 V = 81000 cubic feet then multiply the volume, 81000, by 7.5, or 607,500 gallons.
hope i helped
Since this is in the Mathematics subject my best answer would be Rational.
The answer would be A. -18x^7
hope this helps:)