What is the equation of a circle with center (-4, 7) and radius 6?

a. (x - 4)2 + (y + 7)2 = 6
b. (x + 4)2 + (y - 7)2 = 36
c. (x + 4)2 + (y - 7)2 = 6
d. (x - 4)2 + (y + 7)2 = 36

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.