If the diameter of a circle changes from 6 cm to 12 cm, how will the circumference change?
multiplies by 1//2
multiplies by 2
increases by 6
decreases by 6

Average acceleration: i have no idea how to do this.

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.

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?