Mathematics

Problem

The region bounded by

y=3

and

y=1+x^{2}

for

0\le x\le 1

is revolved about the

x

-axis. For a representative

x

in this interval, which function correctly represents the inner radius

r(x)

of the corresponding washer? a)

r(x)=\sqrt{1+x^{2}}

r(x)=1+x^{2}

r(x)=2-x^{2}

r(x)=3