Ill mark brainlist plss help

9:1

Step-by-step explanation:

Divide both the numerator and denominator by the GCD

81 ÷ 9

9 ÷ 9

Reduced fraction:

9:1

Therefore, 81/9 simplified to lowest terms is 9/1.

∠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°