1. The problem asks which scenario corresponds to the algebraic expression $\frac{365}{y}$. 2. The expression $\frac{365}{y}$ means "365 divided by $y$." 3. Here, 365 represents the days in a year, and $y$ is some number. 4. So, the expression models dividing the days in a year by a number $y$. 5. Among the options, "Barb wants to divide the days in a year by a number" matches this expression exactly. 6. The other options involve multiplication or addition, which do not match the division shown in $\frac{365}{y}$. 7. Therefore, the correct scenario is: Barb wants to divide the days in a year by a number.