Find the area of the surface generated when the given curve is revolved about the given axis. y = 4x + 6, for 0 ≤ x ≤ 3; about the x-axis The area of the surface is square units. (Type an exact answer, using π as needed.)
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Find the area of the surface generated when the given curve is revolved about the given axis. , for ; about the -axis
The area of the surface is square units.
(Type an exact answer, using as needed.)