The portion of a floating iceberg that is below the water sur- face is much larger than the portion above the surface. The total volume V of an iceberg is modeled by V = 9.5S where S is the volume showing above the surface. (a) Find the total volume of an iceberg if the volume show- ing above the surface is 4 km'. (b) Find the volume showing above the surface for an ice- berg with total volume 19 km³.

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