Find the length of the missing side

100 points, hi, i’m not sure how to get the equation from the graph and table.

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