The radius of a cylinder is 7.8 x 10^-4 m. The height of the cylinder is 3.4 x 10^-2 m. What is the volume of the cylinder? Write your answer in scientific notation. (Hint: v= pi r^2h)

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.