Perform the indicated operations. Simplify the answer.
? 
A. 11
B. 11i
C. -11
D. -11i
Answer: C
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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 = 4Density: ? = 
A. 
B. 
C. 
D. 
Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = x, y = 0, x = 2, x = 6
A. 20?
B. 
?
C. 
?
D. 16?
Solve the problem.The total sales in dollars of some small businesses fluctuates according to the equation 
where x is the time in months, with 
corresponding to January, 
and 
Determine the month with the greatest total sales and give the sales in that month.
A. December; $10,100 B. March; $10,100 C. June; $7100 D. September; $4100
Solve the problem.The cheapest-link algorithm for solving the Traveling Salesman Problem is
A. an optimal and efficient algorithm. B. an approximate and inefficient algorithm. C. an approximate and efficient algorithm. D. an optimal and inefficient algorithm. E. none of these