A42 inch board was cut into three pieces so that the second piece is twice as long as the first piece and the third piece is three times as long as the first piece of x represents the length of the first piece find the lengths of all three pieces

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.