During a seven-day period the level of an irrigation pond receded 28 centimeters.write a division expression to represent the change.then determine the average daily change in the level of the pond.
28/7 The change was 28 centimeters, and the amount of time was 7 days. So you divide the amount of change by the number of days to get the rate of change which is 28/7, which simplifies to 4. So the average daily change was 4 centimeters.