The school decides to do an additional band concert. The band director expects a
40% increase from the 110 tickets previously sold.

44 more

Step-by-step explanation:

To find the % of something simply turn 40% to a decimal (.4) then times it by the number you want .4 * 110 = 44

you need a common difference between consecutive terms to be constant, like 1,2,3,4 or 2,4,6,8, or 1,3,6,9

∠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°