Pls help simplify! I’ll give brainlest

What is the base of 1/9 to the power of 2

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)