The area of north dakota is 77,353 square miles. the area of south dakota is 70,700 square miles. how many square miles greater is the area of north dakota than the area of south dakota?

Which expression is equivalent to the expression for the perimeter of the larger garden?

You are in charge of the customer service phone line with many employees. at the end of each phone callthe customers are asked to rate their service from 1 to 5 stars, with 5 being the best. you find the averagerating for 20 randomly selected employees and decide you want to improve the ratings so you require thoseemployees to go through a new training program. you then wait a week and find the new average rating foreach employee. the average change is an increase in 1.3 stars with a standard devation of .9 stars.(a) is this data paired or not paired? (b) what are the null and alternative hypothesis being tested? (c) what is the t-statistic you would use? write the general formula and the final calculation.(d) sketch a t-distribution, label your t-statistic and the probability you would be interested in:

Ineed with number 8 and answer fast because i only have 11 minutes or else i get a f for my report card