Question Statement:
According to the US Public Health Service homogenization index, homogenized milk has satisfactory stability if, after 48 hours of quiescent storage at $4^\circ\text{C}$, the fat percentage in the top $100\text{ mL}$ does not differ by more than $10\%$ of the fat percentage of the remaining milk. If remaining milk has $3.0\%\text{ fat}$, the maximum allowable fat percentage in the top $100\text{ mL}$ is $3.0 \times 1.10$, which equals: