What is the meaning of the unknown factor and the quotient

Is the point (0, 8) on the x-axis or y-axis? how do you know?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

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.