Select the correct answer from each drop-down menu. A cell phone company’s profit is modeled by the function p(x) = − x2 + 10x − 1, where p is expressed in thousands of dollars and x is the number of phones sold in hundreds. The company has to make between to phones to make a profit of at least $15,000.

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.