-At the doctor's office, there is a scale that measures people's weight. The needle is 20 cm long and rotated 100° when Frank stepped on it. How far did the needle travel as it rotated?

Question

anonymous · Answer

9 pi over 100

 100 pi over 9

 2000π

 1000π

anonymous · Answer

Length of an Arc: $$\frac{ n }{ 360 } \times 2\pi r$$
Where n is the angle and r is the radius.
In this case n would be the degrees that the needle rotates and the radius is the length of the needle.

anonymous · Answer

so then it would be b @wotseit

anonymous · Answer

Correct! Good job :)