Final answer:
Waters Co. appears to have the worst asset turnover ratio.
Step-by-step explanation:
The asset turnover ratio is calculated by dividing the net sales of a company by its average total assets.
Based on the provided information, Waters Co. has the highest asset turnover ratio at 3.7%. This means that Waters Co. generates more sales per dollar of assets compared to Xenon Co. (2.4%) and Zenith Co. (2.6%). Therefore, Xenon Co. appears to have the worst asset turnover ratio among the three companies.