Which expression has a value of 13? (20 ÷ 4) − 4 + 3 x 2 (18 ÷ 2) + 6 ÷ 6 + 3 (16 ÷ 4) + 3 x 4 − 1 (10 ÷ 2) − 3 + 4 x 2

Identify the graph of y = ln x + 1.

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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.