Answer:

Step-by-step explanation:
The open circle means that the point is not included in the solution set, and the arrow pointing left means that all numbers less than -2 are members.
In set-builder notation, each term has a special meaning. The braces enclose the members of the set.
Here's how you translate the notation,

It's 369.6
(840X44)/100 = 369.6
B . 5635.6% not for sure but I think that’s the answer