The area of the circle is \( \pi r^2 = 3.14 \times 5^2 = 3.14 \times 25 = 78.5 \).
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- A circle has a circumference of 31.4 units. What is its area? (Use \( \pi \approx 3.14 \))
- The circumference is given by \( 2\pi r = 31.4 \).
- Solving for \( r \), \( r = \frac{31.4}{2 \times 3.14} = 5 \).
- The sum of the squares of three consecutive integers is 365. What is the middle integer?
- Let the integers be \( n - 1, n, n + 1 \).
- Their squares sum to \( (n - 1)^2 + n^2 + (n + 1)^2 = 365 \).
