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To solve the problem of how many feet of fence are needed to enclose a circular race track that is 1.5 miles long, we need to find the **circumference** of the circle. Since the distance given is the length around the circular track, the formula to use is:

\[
C = 2 \pi r
\]

Where \(C\) is the circumference, and \(r\) is the radius of the circle. However, instead of calculating the radius, we are directly given the circumference as 1.5 miles. To convert this into feet:

\[
1.5 \text{ miles} = 1.5 \times 5280 \text{ feet/mile} = 7920 \text{ feet}
\]

So, the correct answer is **7,920 feet** of fence are required.

Would you like more details or have any questions? 

Here are 5 related questions to expand on the topic:
1. How do you find the radius of a circle if the circumference is given?
2. How would the required fencing change if the race track length was doubled?
3. What is the formula to convert miles to feet?
4. Can you calculate the area enclosed by the race track using the radius?
5. How would the solution change if the track were an oval instead of circular?

**Tip**: When solving problems involving conversions, always double-check the units to ensure consistency throughout the calculations.

How many feet of fence are needed to enclose a circular race track 1.5 miles long? (Hint: There are 5,280 feet in a mile.)

Learn how to calculate the feet of fence required to enclose a circular race track that is 1.5 miles long. This problem covers key geometric concepts and unit conversions, including the formula for the circumference of a circle. Suitable for students in Grades 6-8.

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