During heavy rain, a section of a mountainside measuring 6.0 km horizontally (perpendicular to the slope) 0.92 km up along the slope, and 2.9 m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.57 km x 0.57 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 4.5 m2 area of the valley floor?

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