John knows that his own income is a 107 on the income scale. He wonders, what z-score is associated with the income score of 107? And what percentage of people in Idaho is he richer than? Draw this on a normal curve and shade in the appropriate space and answer his questions.

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