D. y = 9 because it has a complete zero slope while the y-intercept of the equation is 9, so the equation is y = 9.
i feel your pain though :/
Answer:
ill guess -2 for u
Step-by-step explanation:
The disk method will only involve a single integral. I've attached a sketch of the bounded region (in red) and one such disk made by revolving it around the y-axis.
Such a disk has radius x = 1/y and height/thickness ∆y, so that the volume of one such disk is
π (radius) (height) = π (1/y)² ∆y = π/y² ∆y
and the volume of a stack of n such disks is

where
is a point sampled from the interval [1, 5].
As we refine the solid by adding increasingly more, increasingly thinner disks, so that ∆y converges to 0, the sum converges to a definite integral that gives the exact volume V,


I believe the answer would be: 4+y<15