(E) 2 and 4- The table shows the velocity at various times of an object moving along a line. An estimate of
its acceleration (in ft/sec^2 ) at t = 1 is
(A) 0.8
(B) 1.0
(C) 1.2
(D) 1.4
(E) 1.6
For Questions 67 and 68, f ′(x) = x sin x − cos x for 0 < x < 4.
- f has a local maximum when x is approximately
(A) 0.9
(B) 1.2
(C) 2.3
(D) 3.4
(E) 3.7 - The graph of f has a point of inflection when x is approximately
(A) 0.9
(B) 1.2
(C) 2.3
(D) 3.4
(E) 3.7
BC ONLY
In Questions 69–72, the motion of a particle in a plane is given by the pair of equations x = 2t and y =
4 t − t^2.
- The particle moves along
(A) an ellipse
(B) a circle
(C) a hyperbola
(D) a line