Suppose a company needs temporary passwords for the trial of a new payroll software. each password will have two letters, followed by one digit, followed by one letter. the letter will not be used. so, there are letters and digits that will be used. assume that the letters can be repeated. how many passwords can be created using this format?

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

How many lines can be drawn through points j and k? 0 1 2 3

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0