7-8 divided by 4 (3 to the second power -1)

Can any one me with the answers to these questions asap?

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "

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.