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The function s=−t^3+12t^2−48t​ , 0≤t≤5​, gives the position of a body moving on a coordinate​ line,...

The function s=−t^3+12t^2−48t​ , 0≤t≤5​, gives the position of a body moving on a coordinate​ line, with s in meters and t in seconds.

a. Find the​ body's 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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