Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 3
B. 
= 0, 
= 0, 
= 12
C. 
= 0, 
= 0, 
= 2
D. 
= 0, 
= 0, 
= 18
Answer: B
Mathematics
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Write the vector v in terms of i and j whose magnitude 
and direction angle ? are given.
= 10, ? = 120°
A. v = -5
i + 5
j
B. v = 5i - 5
j
C. v = -5i + 5
j
D. v = 5
i - 5j
Mathematics
Simplify the expression.-8 + 4(-2) - 13
A. -47 B. -13 C. -37 D. -29
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 
D. 
Mathematics
Write the sum without using sigma notation.  figure 1.png)
 figure 2.png)
Mathematics