Solve the problem.Find the center of mass of the region of density 
bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 8
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 4
D. 
= 0, 
= 0, 
= 
Answer: D
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Solve the problem.Suppose your job is to take phone orders for automotive parts. Use the table below to answer the following questions. Write the correct part number that matches what you hear the customer say on the phone. 
"Can you rush me the 8-thousandth inch size?"
A. B B. A C. I D. G
Find the domain of the rational expression. 
A. {x|x is a real number and x ? -3 and x ? -2} B. {x|x is a real number and x ? -3 and x ? -2 and x ? 2} C. {x|x is a real number and x ? 3 and x ? 2} D. {x|x is a real number and x ? 3 and x ? -2 and x ? 2}
Solve the problem.Jeremy can stand on one leg for 8.3 min. Express this time in seconds.
A. 486 sec B. 498 sec C. 462 sec D. 474 sec
Multiply.9 ? 40
A. 400 B. 360 C. 320 D. 49