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A flat slab of styrofoam, with a density of 45 kg/m, floats on a lake. (Assume this is a freshwater lake so the water's

A flat slab of styrofoam, with a density of 45 kg/m, floats on a lake. (Assume this is a freshwater lake so the water's density is 1000 kg/m.) What minimum volume must the slab have so that a 35 kg child can sit on the slab without it sinking? Express your answer using three significant figures along with its unit.

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