Concept explainers
When the Radius Increases
a. A rope is wrapped tightly around a wheel with radius of
b. Consider a rope wrapped around the Earth’s equator. We noted in Exercise 17 that the radius of the Earth is about
The Size of the Earth The radius of the Earth is approximately
a. How far is it around the equator? (Hint: You are looking for the circumference of a
b. What is the volume of the Earth? (Hint: The volume of a sphere of radius
b. What is the surface area of the Earth? (Hint: The surface area of a sphere of radius
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FUNCTIONS AND CHANGE COMBO
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