Final answer:
The ratio of AC to CB is 0.202.
Step-by-step explanation:
To find the ratio of AC to CB, we need to determine the length of CB. Since line segment AB is one unit long and AC = 0.168, we can subtract AC from AB to find CB. CB = 1 - 0.168 = 0.832. Therefore, the ratio of AC to CB is AC/CB = 0.168 / 0.832 = 0.202.