Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
The volume of water in a reservoir decreases 21,000 cubic yards over a 3-month period. What is the average change in volume per month?
To find the average change in volume per month, we need to divide the total decrease in volume by the number of months:
Average change = Total decrease / Number of months
In this case, the total decrease is 21,000 cubic yards and the number of months is 3, so we can plug these values into the formula:
Average change = 21,000 / 3
Simplifying the division, we get:
Average change = 7,000
Therefore, the average change in volume per month is 7,000 cubic yards.