Amedium-sized apple has 70 calories. this is 10 calories less than 1/4 of the calories in an old westie chocolate bar. we need to find out how many calories are in the chocolate bar! choose the best model for the first step of this problem

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.