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8. [-/6 Points] DETAILS MY NOTES Consider the closed region bounded by y = 4e-*, y = 4, and x = 7. In each case,

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8. [-/6 Points] DETAILS MY NOTES Consider the closed region bounded by y = 4e-*, y = 4, and x = 7. In each case, write an integral giving the volume of the solid. (a) Rotate the region around the x-axis. dx (b) Rotate the region around the line y = 4. dx

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