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27 January, 09:19

d (t) = 0.8t^2. What is the average speed, in meters, per second of the rockm between 5 and 10 after was it dropped

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  1. 27 January, 09:29
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    The average speed is of 12 meters per second.

    Step-by-step explanation:

    The average speed can be given by the difference in position divided by the different in time.

    Average speed, between 5 and 10 seconds.

    d (t) = 0.8t²

    d (5) = 0.8 * (5) ² = 20

    d (10) = 0.8 (10) ² = 80

    Times: 5 and 10 seconds. So

    v = (80 - 20) / (10 - 5) = 12

    The average speed is of 12 meters per second.
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