What does this equal to
(b^3)2

Step-by-step explanation:

If the 2 is a number, then distribute it to the b^3 to get 2b^3.

If the 2 is an exponent, then multiply the 3 and 2 to get b^6.

∠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°