Fill in the blank with a symbol that makes this statement true with my homework

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Find the measure of the angle indicated in bold