I have a math test today, anyone be able to help me and explain the steps?

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?

What’s the domain of this function? fastttt

Anyone know? will mark brainliest if you're correct!