Evaluate for x = 2, y = – 5, and z = – 10. A. x-2y B. x^2 – z^2 C. (x – z)^2 D. x−2y/3y [fraction] E. x+5/y+5 [fraction]

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.