Hi, I am having trouble with this problem and I need help. Thank you.  The problem is: A particle moves according to a law of motion s = f(t), t ≥ 0, where t is measured in seconds and s in feet.  f(t)=t^3 - 9t^2 +24t  . When is the particle at rest? t= ?

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Q: how could I solve the question that's written on paper? Thank you so much.

A: Steps and explanations are as follows:In case of any doubt, please let me know. Thank you.

Q: please help thank you a lot. also please don't use chat gpt because that answer is wrong

A: Step 1:Method 1  Step 2:Method 2 Step 3: Step 4:

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