Solve the problem.Hooke's law is applicable to idealized (linear) springs that are not stretched or compressed too far. Consider a nonlinear spring whose restoring force is given by F(x) = 17x - 0.3x3, for |x| ? 9. How much work is done in stretching the spring from its equilibrium position (x = 0) to x = 1? Round to two decimal places when appropriate.
A. 8.43 J
B. 392.85 J
C. 196.43 J
D. 16.7 J
Answer: A
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Identify the type of surface represented by the given equation.
+ 
= 4
A. Ellipsoid B. Elliptical cylinder C. Parabolic cylinder D. Paraboloid
Solve the equation for the specified variable.S = 2?rh + 2?r2 for h
A. h = 
B. h = 2?(S - r)
C. h = S - r
D. h = 
- 1
Solve the problem.The size of the beaver population at a national park increases at the rate of 
per year. If the size of the current population is 131, find how many beavers there should be in 3 years. Use 
and round to the nearest whole number.
A. 149 B. 153 C. 155 D. 151
Find the unknown side of the right triangle. Use a calculator or square root table when necessary and round to the nearest thousandth.
A. 280 m B. 140 m C. 10 m D. 16.733 m