Nancy has classes three days a week. She attends class three days a week 80 percent of the time, two days 15 percent of the time, one day 4 percent of the time and no days 1 percent of the time.
Find the expected value of how often Nancy attends classes every week.

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

Is the figure congruent? yes or no?

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