Which expression is equivalent to -7 - (-2.5)−7−(−2.5)minus, 7, minus, left parenthesis, minus, 2, point, 5, right parenthesis? A)7+(−2.5) B)−2.5−7 C)−7+2.5 D)2.5+7

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.