Asociologist found that in a random sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.2. the population standard deviation is 2.1
find the 99% confidence interval of the mean number of jobs. do not round the z value, it should have two decimal places, example 2.34. round the interval to one decimal place, example 3.2 < μ < 5.6

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

Asap easy 6th grade 30 pts describe how to rewrite a power with a positive exponent so that the exponent is in the denominator.

Ihave like no idea how to do any of this !