Find the domain of root(x+3) - root(x-3)

Does anyone know how to do geometryme with this problem

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

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.)