Which pair of lines are parallel? helppp plz

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.

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.