Barrons AP Calculus - David Bock

(C) 0 < t < 8

(D) 0 < t < 12

(E) 4 < t < 12

24. The graph of function f shown above consists of three quarter-circles.
    Which of the following is (are) equivalent to
    I.
    II.
    III.
    (A) I only
    (B) II only
    (C) III only
    (D) I and II only
    (E) all three


25. The base of a solid is the first-quadrant region bounded by and each cross section
    perpendicular to the x-axis is a semicircle with a diameter in the xy-plane. The volume of the
    solid is
    (A)
    (B)
    (C)
    (D)
    (E)


26. The average value of f (x) = 3 + |x| on the interval [−2, 4] is
    (A)
    (B)
    (C)