What was the reading at 3pm?

To determine the reading at 3 PM accurately, you would need to analyze the context or data that led to that specific answer. In this case, if the correct answer is identified as 8.2, it suggests that the data collected at that time indicated this value, possibly from a measurement or an observation relevant to environmental monitoring, such as air quality, water levels, or pollutant concentrations.

The significance of the reading 8.2 could vary based on the parameters being monitored. For example, if the reading pertains to air quality, a value like 8.2 may indicate a certain level of particulate matter or another pollutant, which is crucial for compliance with environmental regulations. Understanding the trends or conditions leading to this reading can help assess environmental health and safety standards.

In contrast, the other readings do not represent the condition logged at 3 PM, suggesting other times or conditions where different values were recorded. Therefore, the focus on 8.2 is paramount, as it captures the state of whatever was being monitored at the specified time, serving as a critical point for analyzing environmental compliance.