Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: portion of the sphere x2 + y2 + z2 = 1 that lies in the first octantDensity: constant
A. 
B. 
C. 
D. 
Answer: A
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What is the arithmetic mean between 6 and 28?
A. 22 B. 17 C. 28 D. 6 E. 11
Solve the inequality, and graph the solution set.p2 - 13p + 42 > 0
A. (-?, 6) ? (7, ?)
B. (-?, 6)
C. (6, 7)
D. (7, ?)
Solve the problem.The stock market gained 17 points on Tuesday and lost 54 points on Wednesday. It had closed on Monday at 2563 points. Where did the market close on Wednesday?
A. 2600 points B. 2492 points C. 2634 points D. 2526 points
Solve the problem.A square component in a television set measures 18 centimeters per side. Next year's design will contain the same square component, but its side will measure only 12 centimeters. By how much will the area of the square be decreased?
A. 180 square centimeters B. 36 square centimeters C. 144 square centimeters D. 24 square centimeters