1. Mathematics
2. Calculus and Analysis
3. Real Analysis
4. Integrals
5. 33171

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20. Let S be the closed region in the first quadrant of the xy-plane bounded by y = 6x2, y = 0, x = 0, and x = 1. What is the volume of the solid obtained by revolving S about the line x = -1?
A. 3x B. 7x C. 36x /5
D. 8x E. 56x /5