Part III: If Maria were to become financially literate, define what sort of decisions she would make and what question she would ask herself in the process. (3 points)

Pls! does anybody know a shortcut for answering these types of questions in the future?

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.

Is of - 4x + 2? a. 3 b. 4 c. 6 d. 5