can you help me with math I don't understand that.

Question

a) Express each set in interval notation.

open circle at 0

close circle at 3

 

b) Express each set in interval notation.

open circle at -2
close circle at 0

Answer 1

An open circle in interval notation is represented by a ( or )

A closed circle is in interval notation by a ] or [

a. (0,3] you try problem b