Find the domain of the rational function.g(x) = 
A. (-?, 0) ? (0, ?)
B. (-?, 3) ? (3, ?)
C. (-?, ?)
D. (-?, -3) ? (-3, ?)
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) = 
A. Domain: all points in the xy-plane satisfying x2 + y2 = 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
B. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
C. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
Find the exact value of the expression.
A. - 
B. - 
C. -2
D. -
Perform the indicated operation. Give the answer in lowest terms.
A. 
B. 
C. 
D. 
Solve the problem.A room measures 
by 
The ceiling is 
above the floor. There is one window measuring 
by 
The door is 
-4.0px;" /> by 
What is the total area of the walls and ceiling (excluding the door and window)?
A. 1035.5 ft2
B. 665.5 ft2
C. 295.5 ft2
D. 699.5 ft2