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The Earth is not a uniform sphere, but has regions of varying density. Consider a simple...

The Earth is not a uniform sphere, but has regions of varying density. Consider a simple model of the Earth divided into three regions?inner core, outer core, and mantle. Each region is taken to have a unique constant density (the average density of that region in the real Earth): Region Radius (km) Density (kg/m3) Inner Core 0-1220 13,000 Outer Core 1220-3480 11,100 Mantle 3480-6380 4400 Use this model to predict the average density of the entire Earth. Express your answer to three significant figures and include the appropriate units. If the radius of the Earth is 6380km and its mass is 5.98×1024kg, determine the actual average density of the Earth. Express your answer to three significant figures and include the appropriate units.

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