Kirana buys boxes of crackers that each has the same cost x. She represents the cost of 2 boxes of cheese​ crackers, 4 boxes of poppy seed​ crackers, and 4 boxes of plain crackers using the expression 2x+4x+4x. What equivalent expression can represent the​ cost? A. 11x
B. (2+4)4x
C. 2•4•4•x
D. 10x

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.