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Do not comment if you aren’t going to . 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. !

Can someone check my answer? you : )

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?