Answer:
s = 4 t^3 + 3 t + 9 position at time t
a) v = ds/dt = 12 t^2 + 3 velocity at time t
b) v = 12 * 3^2 + 3 = 111 velocity at 3 sec
c) a = dv/dt = 24 t
d) a = 72 at 3 sec
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