Need help w/ Acceleration of a Freight Train problem

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junesmrithi
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Question: A freight train has a speed of 29.8 m/s at a given instant and 9.2 seconds later its speed is 26.2 m/s.
train's acceleration is -3.91×10-1 m/s^2

What additional time would be necessary to bring the train to a complete stop, if it continues to slow at the rate given?

What total distance is traveled in stopping during the entire slowing phase?
 
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