Suppose that the cost function for a commodity is 
dollars. Calculate 
to find the actual cost of producing the 4th unit. Round your answer to two decimal places.
?
A. $8.78
B. $8.00
C. $8.39
D. $8.33
E. $8.06
Answer: C
Mathematics
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Find the flux of the vector field F across the surface S in the indicated direction.F = 
k ; S is the upper hemisphere of x2 + y2 + z2 = 4; direction is outward
A. - 
?
B. 
C. - 
D. 
?
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Graph the function.y = 4 sin 
A. 
B. 
C. 
D. 
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Use the properties of logarithms to evaluate the expression.log 10-12
A. log -12 B. -12 C. 12 D. 12 log 10
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