A scientist has one solution that is 30% acid and another solution that is 18% acid. How much of each should he use to
get 300 L of a solution that is 21% acid?

What is x3+3x2−16x−48 divided by x−1?

What is the distance between point a and b

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.