(D)
(E)
50.
(A)
(B)
(C)
(D)
(E)
51.
(A)
(B)
(C)
(D)
(E)
52.
(A)
(B)
(C)
(D)
(E)
53.
y = 3x − x^2 and y = x; about the x-axis.
y = ln x, y = 0, x = e; about the line x = e.
BC ONLY
The curve with parametric equations x = tan θ, y = cos^2 θ, and the lines x
= 0, x = 1, and y = 0; about the x-axis.
CHALLENGE
A sphere of radius r is divided into two parts by a plane at distance h (0 <