Secretariat ran the Kentucky Derby with times for the quarter mile of 25.2 s , 24.0 s , 23.8 s , and 23.0 s .
(A) Find his average speed during each quarter-mile segment .
(B) Assming that Secretariat's instaneous speed at the finish line was the same as the average speed during the final quarter mile , fine his average acceleration for the entire race . ( Hint : recall that horeses in the Derby start from rest )
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