3. If Joe scored a 400 on a test with a mean of 500 and a standard deviation of 25, what would his z-score be?

Solve for x, y, and z. show all steps.

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.

Anew obstacle course is home to several new types of challenging obstacles. one such obstacle is traversing a 15-stair staircase. to make it more challenging, the stairs are not uniformly spaced. rather, the vertical space between consecutive stairs for the first 10 stairs is 113 feet and the vertical space for the last 5 stairs is 134 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?