The first step to sove the equation -18 is shown below.
Which property was applied in this step?
O Addition Property of Equality
O Subtraction Property of Equality
O Multiplication Property of Equality
O Division Property of Equality

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.