Chapter 3 - Radian Measure and the Unit Circle - Section 3.2 Applications of Radian Measure - 3.2 Exercises - Page 109: 2

$s=20\pi$ units

Step 1: The formula to be used here is $s=r\theta$ where s is the length of the arc intercepted, r is the radius and $\theta$ is the central angle of measure in radians. Step 2: $s=r\theta$ Step 3: $s=(16)(\frac{5\pi}{4})$ Step 4: $s=20\pi$ units