Answer Happy

6 At time t≥ 0, the position of a body moving along the horizontal s-axis is s = 2 - 2 sint m. The total distance travelled by the body from t = 0 to t = 2π is D 4 m A 0m C 8 m E NOTA B 2 m

9 Let f(x) = x³: x ≤ 1.Then x>1 (2-x: Af has cusp at x = 0 and corner at x = 1 B f has vertical tangent line at x = 0 and corner at x = 1 Cf has corner at x = 0 and cusp at x = 1 D f has cusp at x = 0 and vertical tangent line at x = 1 E NOTA