To find the arc length \( L \) of a circle corresponding to a central angle, you can use the formula:
\[ L = r \theta \]
where:
- \( r \) is the radius of the circle,
- \( \theta \) is the central angle in radians.
Given:
- \( r = 3 \)
- \( \theta = \frac{\pi}{4} \)
Now, substituting the values into the formula:
\[ L = 3 \cdot \frac{\pi}{4} = \frac{3\pi}{4} \]
So the arc length is:
\[ \frac{3\pi}{4} \]
The correct response is:
\[ \text{Start Fraction } 3 \pi \text{ over } 4 \text{ End Fraction} \]