Find the flux of the vector field F across the surface S in the indicated direction.F = zk , S is the surface of the sphere x2 + y2 + z2 = 4 in the first octant , direction away from the origin
A. 0
B. 2?
C. 
?
D. 
?
Answer: C
Mathematics
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Solve the problem.Find the center of mass of the lamina in the first quadrant bounded by the coordinate axes and the curve 
if 
.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Find the first 4 terms of the recursively defined sequence.a1 = 1, a2 = 2, an + 1 = an + an - 1
A. 1, 2, 2, 4 B. 1, 2, 3, 4 C. 1, 2, 3, 5 D. 1, 2, 2, 3
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Evaluate. 53
A. 125 B. 243 C. 64 D. 15
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Solve the problem.Find the sum of the first 7 terms of the geometric sequence with first term 3 and common ratio 1/2.
A. 
B. 
C. 
D. 
Mathematics