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A typical human cell is approximately 10 μm in diameter and enclosed by a membrane that...

A typical human cell is approximately 10 μm in diameter and enclosed by a membrane that is 4.2 nm thick. To simplify the calculations, model the cell as a sphere.

1)What is the volume of the cell? (Express your answer to two significant figures.)

What is the volume of the cell membrane? (Express your answer to two significant figures.)

What percent of the cell volume does its membrane occupy? (Express your answer to two significant figures.)

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