Answer :

Answer:

C. 25/18 pi units

Step-by-step explanation:

A unit circle is a circle of radius 1 unit.

Length of an arc = central angle / 360° × 2πr

where r = radius = 1 unit and central angle = 250°

Length of an arc = 250/360 × 2π ×1

= 25/36 × 2π

Length of an arc = 25/18π units

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