An art museum has a pentagon-shaped room. When drawn to scale on a coordinate grid, the corners of the room are points A(14,18) ; B(10,18) ; C(10,9) ; D(12,7) ; E(18,12.5), shown in feet. The walls are 10 feet high. The museum is going to paint four of the walls ab bc de ae . Assume one gallon of paint is enough to cover 268 square feet. How many gallons of paint should the museum purchase? Enter your answer as a whole number.

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.