Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
B. Domain: all points in the xy-plane satisfying x2 + y2 ? 9; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
C. Domain: all points in the xy-plane satisfying x2 + y2 = 9; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
D. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 3; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 3
Answer: B
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Express the value of the inverse hyperbolic function in terms of natural logarithms.coth-1 
A. 0
B. 
ln -11
C. 
ln 11
D. 
ln 66
Solve the inequality. Express your answer using interval notation.8x - 5 > 7x - 9
A. (-?, -4]
B. [-4, ?)
C. (-4, ?)
D. (-14, ?)
Solve the problem.A weight attached to a spring is pulled down 3 inches below the equilibrium position. Assuming that the frequency of the system is 
cycles per second, determine a trigonometric model that gives the position of the weight at time t seconds.
A. y = 3? cos 8t
B. y = -3 cos 16t
C. y = -3 cos 
t
D. y = 3 cos 16t
Find the zeros of f(x), given that one zero is k.f(x) = x4 - 6x3 + 6x2 + 6x - 7
k = 1
A. ±1, -3 ± 2i
B. ±1, 3 ± 2i
C. ±1, -3 ± 
i
D. ±1, 3 ± 