Question

what does the open/closed circle on the number line mean?
what does the open/closed circle on the number line mean?
@Mathematics

Answer 1

open circle - end point not included
closed circle - end point included

Answer 2

what do you mean end point not included I need the inequality

Answer 3

Example:

(8,20) means that all points between 8 and 20 are included, but points 8 and 20 themselves are not included

[8,20] means that points 8 and 20 are included