Answer:
1- d
2- a
3- d
4- b
Step-by-step explanation:
16/18=3/n
8/9=0.88888888 recurring
0.8888888 recurring*3=2 2/3
n=2 2/3
Add all of the hours together than divide by 5 should get 40
I believe the answer is 90
Arc tan ( 1/√3 ) = arc tan ( √3/3 ) = 30°
180° = π ( in radians )
30° = 180°/6 = π/6