Question

The volume of water in a resevoir decreases 21,000 cubic yards over a 3-month period.what is the average change in volume per month

Answer 1

so you lose 21,000 cubic yards in 3 months. how many cubic yards do you use a month?

to help you out, your answer will be a measurement of cubic yards per month

Answer 2

21000/3
that is the answer in yards per month

Answer 3

\[\frac{21000 \text{ cubic yards}}{3\text{ months}}=7000 \text{ cubic yards/month}\]