Question: In Exercises the function s(t) describes the motion of a particle along a line. For each function (a) Find the velocity function of the particle

In Exercises the function s(t) describes the motion of a particle along a line. For each function

(a) Find the velocity function of the particle at any time t ≥ 0 

(b) Identify the time interval(s) in which the particle is moving in a positive direction 

(c) Identify the time interval(s) in which the particle is moving in a negative direction

(d) Identify the time(s) at which the particle changes direction

s(t) = t 201 + 128t - 280

s(t) = t 201 + 128t - 280

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