(30 points)

mr. mosley bought 3 magazines for $7.95 each and 2 books for $12.95. if the sales tax is 9%, what is the total cost of mr. mosley's purchases?

a) $ 4.48

b) $ 44.98

c) $ 49.75

d) $ 54.23

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.