n issue of a magazine contained the following statement. 

Dropping less than two inches per mile after emerging from the​ mountains, a river drains into the ocean. One​ day's discharge at its​ mouth, 

8.48.4 

trillion​ gallons, could supply all of country​ A's households for 

sevenseven 

months.

Based on this​ statement, determine how much water an average household uses each month. Assume that there are 

2200 

million households in country A.

Question content area bottom

Part 1

Country A uses approximately 

enter your response here 

gallons per household per month.

To determine how much water an average household in Country A uses per month, we'll use the information provided.

### Step 1: Identify the relevant data
- Total discharge of water in one day: \( 8.4 \) trillion gallons (which is \( 8.4 \times 10^{12} \) gallons).
- This amount can supply all households in Country A for 7 months.
- Number of households in Country A: 2200 million (which is \( 2.2 \times 10^9 \) households).

### Step 2: Calculate the total water used in 7 months
The discharge of \( 8.4 \times 10^{12} \) gallons provides enough water for all households for 7 months. 

So, the total water used by all households in one month is:
\[
\text{Water used per month} = \frac{8.4 \times 10^{12} \text{ gallons}}{7} = 1.2 \times 10^{12} \text{ gallons}
\]

### Step 3: Calculate the water used per household per month
To find the water used by an average household per month, divide the total monthly water usage by the number of households:
\[
\text{Water used per household per month} = \frac{1.2 \times 10^{12} \text{ gallons}}{2.2 \times 10^9 \text{ households}}
\]

### Step 4: Perform the calculation
\[
\text{Water used per household per month} = \frac{1.2 \times 10^{12}}{2.2 \times 10^9} = \frac{1.2}{2.2} \times 10^{3} \approx 0.545 \times 10^3 \text{ gallons}
\]

This simplifies to approximately **545 gallons** per household per month.

---

Would you like further details or have any questions?

Here are some related questions to explore:
1. How does the water usage of Country A compare to that of other countries?
2. How many gallons of water does Country A use in a year?
3. What are some factors that could influence water usage per household?
4. How would water conservation measures impact these figures?
5. What are the environmental impacts of high water usage?

**Tip:** When dealing with large numbers, breaking them down into smaller steps can make the calculations more manageable and reduce errors.

Discover how much water an average household uses per month in Country A based on the daily discharge of 8.4 trillion gallons into the ocean. This calculation involves arithmetic and unit conversion, making it suitable for Grades 5-6.

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