Answer
(a) $16\pi$ radians
(b) $60\pi$ radians
Work Step by Step
(a) Since 1 rotation equals $2\pi$ radians, $8$ rotations equal:
$8\times2\pi=16\pi$ radians.
(b) Since 1 rotation equals $2\pi$ radians, $30$ rotations equal:
$30\times2\pi=60\pi$ radians.
