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

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.