Which of the following would be equivalent to 3^2 ⋅ 3^5?
3^ 10 3 ^ 3
3^ 10 3 ^ 7
31 ⋅ 37
30

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.