Find the flux of the vector field F across the surface S in the indicated direction.F(x, y, z) = 9xi + 9yj + 9zk , S is the surface of the sphere x2 + y2 + z2 = 4 in the first octant, direction away from the origin
A. 24?
B. 36?
C. 0
D. 72?
Answer: B
Mathematics
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Express as a single logarithm and, if possible, simplify.ln (x2 - 64) - ln (x + 8)
A. ln (x + 8) B. ln (x2 - 8) C. ln (x - 8) D. ln (x - 64)
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Simplify the trigonometric expression by following the indicated direction.Multiply 
by 
Fill in the blank(s) with the appropriate word(s).
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Insert the correct symbol between the pair of numbers, either < (less than) or > (greater than).-2 _____ 0
A. < B. >
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Rationalize the denominator. Assume all variables have nonzero values. 
A. 
B. 
C. 
D. 
Mathematics