A rectangular swimming pool is 40 ft wide by 75 ft long. The table gives depths (d) from x = 0 at the shallow end to the diving end. Use the Trapezoidal Rule with n = 15 to estimate the volume of the pool, V = ∫(0 to 75) 40 * d(x) dx.
x: 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75
d: 4.8, 7, 8, 8.7, 9.3, 9.8, 10.3, 10.7, 11.1, 11.5, 11.9, 12.2, 12.5, 12.9, 13.2, 13.5
The volume of the pool is ft^3.
(Round to the nearest integer as needed.)