An 34-kg person puts on a life jacket jumps into the water, Ask an Expert

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An 34-kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 3.4 10-2 m3 and is completely submerged under the water. The volume of the person's body that is under water is 6.4 10-2 m3. What is the density of the life jacket?

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