Use the properties of equality to solve the equation.p - 11 = 17
A. p = 38
B. p = 23
C. p = 6
D. p = 28
E. none of these
Answer: D
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = sin-1(x2 + y2)
A. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0,0) and radii r, 0 < r ? 1
B. Domain: all points in the xy-plane; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
C. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at (0, 0)
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 1; range: real numbers - 
? z ? 
; level curves: circles with centers at (0, 0)
Solve the problem.Water is falling on a surface, wetting a circular area that is expanding at a rate of 
How fast is the radius of the wetted area expanding when the radius is 
(Round your answer to four decimal places.)
A. 0.0089 mm/s B. 112.4689 mm/s C. 0.0559 mm/s D. 0.0178 mm/s
Solve the problem.A company offers three mutual fund plans for its employees. Plan I consists of 2 blocks of common stocks, 3 municipal bonds, and 4 blocks of preferred stock. Plan II consists of 2 blocks of common stocks, 2 municipal bonds, and 1 block of preferred stock. Plan III consists of 4 blocks of common stocks, 5 municipal bonds, and 5 blocks of preferred stock. An employee combined these plans so that he has 22 blocks of common stock, 27 municipal bonds, and 26 blocks of preferred stock. How many units of plan III might he have?
A. 0, 1, 2, 3, 4, 5, or 6 B. 3, 4, or 5 C. 0, 1, 2, 3, 4, or 5 D. 3, 4, 5, or 6
Use Cramer's rule to solve the linear system.
A. x = 9, y = -8, z = -9 B. x = 9, y = 8, z = 9 C. x = 8, y = 9, z = 8 D. x = 10, y = 6, z = 9