PLEASE HELP ASAP. the coordinates of the pre-image triangle DEF are D (-4,5.), E ( 9,-2.), F (0,-6.). the coordinates of the image triangle D'E'F' are D' (-8,10.), E' (18,-4.), F' (0,-12.). what is the scale factor from the pre-image to the image of the center of the dilation is (0,0.)?
a. 1/2.
b. 2.
c. 3.
d. 1/3.

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: