Convert 65, 000,000 to scientific notation

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. !

Solve |2x - 5| = 4 if anyone could , that would be great

Which expression is equivalent to 5r6141 2r+st6