An engineer is hired to construct an earthen debris dam. The low point of the cross section where the 8.5 ft wide dam will be located is denoted at h = 0, with all vertical ground elevations measured...

An engineer is hired to construct an earthen debris dam. The low point of the cross section where the 8.5 ft wide dam will be located is denoted at h = 0, with all vertical ground elevations measured above the zero datum. Compacted soil will be placed above the ground surface elevations to a depth 4.6  ft above the low point. If the cost of obtaining the soil and placement at the site is 300 per cubic yard, what is the project cost? x = distance from the west end of the cross section. Apply the trapezoidal rule.