All the seats in two sections of a movie threater are occupied. In one section, there are 8 rows with 18 seats in each row. In the other section, there are 12 rows with 6 seats in each row. How many people are seated in these two sections of the threater?

216

Step-by-step explanation:

8*18=144

6*12=72

144+72=216

∠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°

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)