Write an equation that expresses the relationship. use k as the constant of variation. w varies directly as z b) w=kz c) k=wz e) none

With #! i’ve tried to figure it out but i can’t.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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.