Find the volume of the conical paper cup. 3 cm
7 cm
O A. 49 pi cm ^3
B. 7 pi cm^3
C. 21 pi cm ^3
O D. 63 pi cm^3

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.