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During heavy rain, a section of a mountainside measuring 3.4 km horizontally, 1.2 km up along the slope, and 0.53 m deep slips intoa valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.40 km x0.40 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 3.8 m2 area of the valley floor?

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