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Let's break down the problem and solve it step by step:

The problem compares temperature changes in two cities: Jacksonville Beach and St. Petersburg.

### Jacksonville Beach, Florida:
- The ocean temperature decreased by an average of **4°F per month** for **5 months**.
- Then, the temperature increased by an average of **3°F per month** for **7 months**.

We calculate the total change in temperature:
1. **Decreased by 4°F for 5 months**:  
   Total decrease = \( 4 \times 5 = 20 \, \text{°F} \)

2. **Increased by 3°F for 7 months**:  
   Total increase = \( 3 \times 7 = 21 \, \text{°F} \)

3. **Total temperature change in Jacksonville Beach**:  
   The overall change is the sum of the absolute changes (because we are asked for total change):
   \[
   20 + 21 = 41 \, \text{°F}
   \]

### St. Petersburg, Florida:
- The ocean temperature decreased by **2°F per month** for **5 months**.
- Then, the temperature increased by **2°F per month** for **7 months**.

We calculate the total change in temperature:
1. **Decreased by 2°F for 5 months**:  
   Total decrease = \( 2 \times 5 = 10 \, \text{°F} \)

2. **Increased by 2°F for 7 months**:  
   Total increase = \( 2 \times 7 = 14 \, \text{°F} \)

3. **Total temperature change in St. Petersburg**:  
   The overall change is:
   \[
   10 + 14 = 24 \, \text{°F}
   \]

### Conclusion:
- Jacksonville Beach had a total temperature change of **41°F**.
- St. Petersburg had a total temperature change of **24°F**.

Thus, **Jacksonville Beach** had a greater change in temperature.

Would you like further details on this solution, or do you have any questions?

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Here are five related questions to consider:
1. What would the total temperature change be if the number of months increased for Jacksonville Beach?
2. How would the comparison change if the temperature variations in St. Petersburg were larger?
3. What happens if the temperatures decreased for 7 months and increased for 5 months in both cities?
4. Can this method of calculating absolute temperature changes be applied to other natural phenomena?
5. What would the outcome be if the temperature changes were alternating between increase and decrease monthly?

**Tip:** Always add absolute values when calculating total changes over time to account for both increases and decreases.

In Jacksonville Beach, Florida, the ocean temperature decreased by an average of 4°F each month for 5 months and then increased by an average of 3°F for 7 months. In St. Petersburg, Florida, the ocean temperature decreased by 2°F for 5 months and then increased by 2°F for 7 months. In which location did the ocean have a greater change in temperature?

Understand how to compare temperature changes in Jacksonville Beach, where temperatures decreased by 4°F per month for 5 months and increased by 3°F per month for 7 months, with St. Petersburg, where temperatures decreased by 2°F for 5 months and increased by 2°F for 7 months. Learn how to calculate total temperature changes and determine which location had the greater change. Suitable for Grades 6-8.

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