Parallelogram PQRS is rotated 90 degrees counterclockwise about the origin to create parallelogram P'Q'R'S'. Which rule describes this transformation? A.(x, y) → (-y, x)

B.(x, y) → (-x, -y)

C.(x, y) → (y, -x)

I just pls need the answer

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.