Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 1
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 3
Answer: D
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Find the area of the rectangle or square.
14 ft
A. 49 square feet B. 196 square feet C. 98 square feet D. 147 square feet
Solve.81x2 + 4y2 = 3242y - 9x = 18
A. (0, -9), (2, 0) B. (0, 9), (-2,0) C. (0, -2), (9, 0) D. (0, 2), (0, -9)
Solve the problem.Find an equation of the form 
that describes the outline of a satellite dish such that the bottom of the dish passes through (0, 0), the diameter of the dish is 24 inches, and the depth of the dish is 5 inches
A. y = 
x2
B. y = 
x2
C. y = 
x2
D. y = 
x2
Encode or decode the given message, as requested, numbering the letters of the alphabet 1 through 26 in their usual order.Use the coding matrix A = 
to encode the message LIFE.
A. 
B. 
C. 
D. 