_
20. The area of a playground is 320 yd?. The width of the playground is 4 yd longer than its length Find the
length and width of the playground.
a. length = 20 yd, width = 16 yd
length = 20 yd, width = 24 yd
b. length = 24 yd, width = 20 yd
d. length = 16 yd, width = 20 yd

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.