What is the differences between 2^8 and 8^2?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters