There are 126 seats in a meeting room. there are 9 seats filling up each row. there are 90 people seated, filling up full rows. how many rows are empty? answer the question with steps or you will not get brainliest.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°