Which of the following questions describes the equation m - 4 = 7?
a. what number, when subtracted from four, results in seven?
b. what number, when four is subtracted from it, results in seven?
c. what number, when subtracted from seven, results in four?
d. what number, when seven is subtracted from it, results in four?
exsplain how you got the answer

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.