Change 0.48 into a fraction or mixed number

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

What is the value of the expression below? (81^2)^1/8

What is the missing step in this proof ?