Adam bought an 8 foot wooden board. he used 1 1/2 feet to make shelf and 3 3/8 feet to make a storage unit for toys. he need 4 feet of the board to make another shelf. does adam have enough wooden board left to make the other shelf?
explain.

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.