15 POINTS Five decimal numbers are represented on the number line above. Write an expression for each given result and use one or more complete sentences to explain why your expression will have the given result.

a negative product
a positive quotient
a negative sum
a positive difference

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.