The problem is to determine the weight of an object in various places using the following equation: w – Cr^-2, where C is a constant, and r is the distance that the object is from the center of the earth.

a. Solve the equation w = Cr^-2 for r.

b. Supposed that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the earth.)

c. Use the value of C you found in the previous question to determine how much the object would weigh in:

Death Valley (282 feet below sea level)

The top of Mt. McKinley (20,430 feet above sea level)

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