A water tank leaks 5 gallons of water each day. What integer represents the change in the number of gallons of water in the tank after 7 days?

If the water tank leaks 5 gallons of water each day, after 7 days the total amount of water lost is:

\[
5 \, \text{gallons/day} \times 7 \, \text{days} = 35 \, \text{gallons}
\]

Since the tank is losing water, the change in the number of gallons is negative. Therefore, the integer representing the change in the number of gallons is:

\[
-35 \, \text{gallons}
\]

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Here are 5 related questions to explore:
1. How many gallons would be lost in 10 days?
2. If the tank holds 100 gallons initially, how much water remains after 7 days?
3. What is the rate of water loss per hour if 5 gallons leak per day?
4. If the leak slows down to 3 gallons per day, how much water is lost after 7 days?
5. How long would it take for the tank to empty completely if it holds 50 gallons?

**Tip**: When dealing with problems involving rates of change, always consider whether the change is positive (increase) or negative (decrease).

Learn how to calculate the total water lost from a tank that leaks 5 gallons each day over a period of 7 days. This problem involves basic multiplication and understanding negative numbers, suitable for students in Grades 4-6.

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