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  1. Multiple Choice: The function f(x) = x2 is bounded by the y-axis and the line y = 4. The volume generated by revolving the region about the y-axis can be found by which of the following integrals? Homework Help ✎

  2. a. I only

    b. II only

    c. III only

    d. I and II

    e. I and III

If you want to use disks/washers, then rotate horizontal rectangles...
that means that both the bounds and the integrand must be written in terms of y.

If you want to use shells, then use x-values.