I have to find what the measure is for ABE pls help

Solve for x i'll try to attach the files bc it's not letting me for some reason

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.