A particle's position is given by z(t) = −(7.30 m/s2)t2 for t ≥ 0. (Express your answer in vector form.) (a) Find the particle's velocity at t = 2.50 s and t = 3.25 s. (b) What is the particle's average velocity during the time interval from t = 2.50 s to t = 3.25 s?
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(b) What is the particle's average velocity during the time interval from
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