Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = - 3 and x = 3. The cross sections perpendicular to the x-axis are semicircles whose diameters run from 
to 
A. 9?
B. 72?
C. 18?
D. 36?
Answer: C
Mathematics
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = (2x - 9y)3
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c ? 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
Mathematics
Solve the equation.
- 
= 
A. {
}
B. {16}
C. {48}
D. {-16}
Mathematics
Solve the system of equations by elimination, if a solution exists.
A. No solution B. x = 6, y = -1 C. x = 5, y = 0 D. x = 6, y = 5
Mathematics
Add or subtract as indicated. Simplify, if necessary.
+ 
A. 
B. 
C. 
D. 
Mathematics