Honors Physical Science

Did the object have a greater acceleration from 0s-8s or from 9s - 16s? What was the difference between the 2 accelerations?

I figured out that the acceleration for 0s - 8s is 3cm/s and that the acceleration from 9s - 16s is -3.28cm/s
but i don't know which one has the greater acceleration, (though i think it is 0s-8s) and i don't know what the difference between the 2 accelerations is.

If this is confusing just let me know and i'll try to explain it better.

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  1. I assume the acceleration from 9s - 16s is 3.28 (not -3.28). If so, then subtract 3.0 from 3.28 to find the difference.

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    Ms. Sue
  2. how do I solve the Quadritic Functions?

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