Write an equation of the line that passes through
(7,10)
(7,10)
and is perpendicular to the line
y=
1
2

x−9
y=12x−9
.

Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x â’ 1 , y = 0, x = 5; about the x-axis v = sketch the region. sketch the solid, and a typical disk or washer.