What's the break down of 720080 in expanded form with exponents

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. !

Consider the graph of the exponential function y=3(2)×

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.