Please help my pick A B C OR D

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Can some one me with these questions