Solve the problem.The heights of nine different mountains are shown in the table below. Find the mean height. Round your answer to the nearest foot. 
A. 20,837 ft
B. 19,850 ft
C. 20,309 ft
D. 20,716 ft
Answer: D
Mathematics
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Evaluate the surface integral of the function G over the surface S.G(x, y, z) = x + z; S is the surface of the wedge formed from the coordinate planes and the planes 
and y = 3
A. 
+ 12
B. 
+ 6
C. 
+ 12
D. 20 + 12
Mathematics
Use the distributive property to rewrite the expression. Simplify if possible.6x + 6z
A. 36(x + z) B. 6(x + z) C. 6(xz) D. 12(x + z)
Mathematics
Change the mixed number to an improper fraction.3
A. 
B. 
C. 
D. 
Mathematics
Multiply and simplify.12 ? 
A. 
B. 
C. 2
D. 72
Mathematics