Simplify the expression.
? 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.Find the center of mass of the upper half of a solid ball of radius 1 centered at the origin if the density at any point is proportional to the distance from that point to the 
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
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D. (
, 
, 
) = 
Mathematics
Evaluate.0 - 22
A. 220 B. 0 C. -22 D. 22
Mathematics
Solve the problem.In a survey of 374 computer buyers, 159 put price as a main consideration, 218 put performance as a main consideration, and 57 listed both price and performance. How many computer buyers listed other considerations? How many looked only for performance?
A. 54; 161 B. 102; 161 C. 54; 218 D. 111; 218
Mathematics
Factor.4 + 4x + x2
A. (x + 2)(x - 2) B. (x - 2)2 C. (x + 2)2 D. Not factorable
Mathematics