Final answer:
When Rosemary pays her niece $50 to help her organize the office, the impact on the Accounting Equation is that Assets decrease; Owner's equity decreases.
Step-by-step explanation:
When Rosemary pays her niece $50 to help her organize the office, the impact on the Accounting Equation is that Assets decrease; Owner's equity decreases. This is because paying her niece represents a decrease in assets (cash) and a decrease in owner's equity (Rosemary's personal investment in the business). The equation is: Assets = Liabilities + Owner's equity. When assets decrease, owner's equity also decreases.