Solve the problem.Find the equation of the surface that results when 9x2 + 6y2 = 11 in the xy-plane is revolved about the y-axis.
A. 9x2 + 9y2 + 9z2 = 11
B. 9x2 + 6y2 + 9z2 = 11
C. 6x2 + 6y2 + 6z2 = 11
D. 6x2 + 9y2 + 6z2 = 11
Answer: B
Mathematics
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A. 
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