Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: "nose" of the paraboloid x2 + y2 = 2z cut by the plane z = 3Density: ? = 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use trial and error to factor the trinomial, or state that the trinomial is prime.4y2 + 12y + 9
A. (2y - 3)(2y - 3) B. prime C. (2y + 3)(2y + 3) D. (4y + 3)(y + 3)
Mathematics
Solve.The profit made when t units are sold is given by 
for t > 0. Determine the values of t for which P < 0 (a loss is taken).
A. (0, ?) B. [16, 18] C. (-?, 16) ? (18, ?) D. (16, 18)
Mathematics
Write the decimal as a fraction or mixed number in lowest terms.1.01
A. 
B. 
C. 1
D. 
Mathematics
Solve the problem.A canoeist who took 6 hours to paddle 6 miles upstream was able to return to his starting spot in 45 minutes. What was the rate of the current?
A. 4.5 mph B. 5 mph C. 4 mph D. 3.5 mph
Mathematics