Axia College Material
Appendix E
Radicals
Application Practice
Answer the following questions. Use Equation Editor to write mathematical expressions and equations.
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Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to
miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions.
1.
Many people know that the weight of an object varies on different planets, but did you know that
the weight of an object on earth also varies according to the elevation of the object? In particular,
the weight of an object follows this equation:
2

=
Cr
w
, where C is a constant, and r is the
distance that the object is from the center of the earth.
a.
Solve the equation
2

=
Cr
w
for r.
W= Cr^(2)
Wr^2= C
R^2= C/W
R = √ (C/W)
b.
Suppose 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.)
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 Winter '09
 DON'TKNOW
 Oceanography, sea level, Above mean sea level

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