Answer:
B. 311.2°
Explanation:
Given minor arc CE is 48.8°, you want the measure of major arc CBE.
Arcs of a circle
The measures of arcs of a circle total 360°.
CE +CBE = 360°
48.8° +CBE = 360° . . . . . . . . . . substitute known value
CBE = 360° -48.8° = 311.2° . . . . subtract 48.8°
The measure of arc CBE is 311.2°.