What is the value of the 7 in the number 53.75?
Give your answer as a fraction

Find x & pleeeeaaaassseeee me !

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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.