A landowner wanted to determine the change in the water levels of his pond over time. First, he filled the pond to a water level of five feet After two weeks, the water level was at 3.4 feet.
To determine the change in water levels over time, you need to calculate the difference between the initial water level and the final water level.
Initial water level: 5 feet
Final water level: 3.4 feet
Change in water level = Final water level - Initial water level
Change in water level = 3.4 feet - 5 feet
Change in water level = -1.6 feet
Thus, the water level in the pond decreased by 1.6 feet over the two-week period.