Now that you have strategies for finding the volume and surface area of a
sphere, return to problem 11-67 and help Alonzo answer his questions. That is,
determine:
The area of the Earth's surface that is covered in water.
The percent of the Earth's surface that lies in the United States.
. The volume of the entire Earth.
Remember that in Chapter 10, you determined that the radius of the Earth is
about 4,000 miles. Alonzo did some research and discovered that the land area
of the United States is approximately 3,537,438 square miles.
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