What number is a solution of the inequality 3<3x-15

Which of the following is the shape of a cross section of the figure shown below

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

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