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3.4.3 e The function s=r-9r + 271, Osts4, gives the position of a body moving on a coordinate line, with s in meters and

3.4.3 e The function s=r-9r + 271, Osts4, gives the position of a body moving on a coordinate line, with s in meters and t in seconds. a. Find the bodys displacement and average velocity for the given time interval. b. Find the body's speed and acceleration at the endpoints of the interval. c. When, if ever, during the interval does the body change direction?

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