Math calculus 301

(11) A particle is moving along a horizontal straight line. Its position, 3(t), velocity, v(t), and acceleration, a(t), for t Z 0 are as follows: s(t) = t3 6t2 15t, 'v(t)= 3t2 12t 15, a(t) = 6t 12. Determine the time intervals, if any, during which the object is moving left. (12) Find the number(s) at which f is discontinuous. Explain your answer. cc, 1:51 f(z)= 1, 1 0 and f(3)