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To find the circumference and area of a circle, we use the following formulas:

1. **Circumference** \( C \) of a circle:  
   \[
   C = 2\pi r
   \]
   where \( r \) is the radius of the circle.

2. **Area** \( A \) of a circle:  
   \[
   A = \pi r^2
   \]
   where \( r \) is the radius of the circle.

In this case, the radius \( r \) is given as **7 miles**.

### 1. Circumference:
\[
C = 2\pi \times 7 = 14\pi \approx 43.98 \text{ miles}
\]

### 2. Area:
\[
A = \pi \times 7^2 = \pi \times 49 = 49\pi \approx 153.94 \text{ square miles}
\]

### Final Answers:
- **Circumference**: approximately **43.98 miles**
- **Area**: approximately **153.94 square miles**

Would you like more details or have any further questions? 

Here are some related questions to extend your understanding:

1. What is the formula for the diameter of a circle, and how does it relate to the radius?
2. How would the circumference and area change if the radius were doubled?
3. If the radius of a circle is increased by 10%, how does that affect the area?
4. How can you express the circumference and area in terms of diameter?
5. What are some practical applications of knowing the circumference and area of a circle in real life?

**Tip**: Remember, the value of \( \pi \) is often approximated as 3.1416 for most calculations, but using a more precise value can improve accuracy!

Find the circumference and area of a circle with a radius of 7 miles.

Learn how to calculate the circumference and area of a circle with a radius of 7 miles. This problem covers key geometric concepts, including the formulas for the circumference and area of a circle. Suitable for students in Grades 6-8.

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