Steven cuts a 25 foot board piece into 2 pieces

12.5

Step-by-step explanation:

if you have a 25ft board piece cut into 2

25/2 = 12.5

∠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°