Answer:
either 56.52 or 113.04
Step-by-step explanation:
if 18 is the diameter: C= 56.52 feet
if 18 is the radius: C= 113.04
40 degrees
Angle ACO = 80 ( 180 - 100)
Angle CAO = 60 (180 - 120)
Angle AOC = 40 (180 - 80 - 60) (TOTAL DEGREES OF A TRIANGLE IS 180)
1) vertical-Line test
2)y=x
3)x
4)domain