Let
C
be the curve
y=3\sqrt(x)
for
1.2<=x<=3.1
. Find the surface area of revolution about the x-axis of
R
. Surface area
=\int_(1.2)^(3.1) f(x)dx
where
f(x)=
◻
Now integrate to find surface area
=\int_(1.2)^(3.1) f(x)dx=