Aball is dropped from a height of 10 feet and returns to a height that is one-half of the height from which it fell. the ball continues to bounce half the height of the previous bounce each time. how far will the ball have traveled when it hits the ground for the fourth time?

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.