A family needs to build fencing around their rectangular
home and square swimming pool, depicted below.
The total amount of fencing they need can be written
x + 10.
as
Pool (2x) yd
If x = 5;
The family needs
their home.
yards of fencing for
yards of fencing for their
Home
The family needs
pool.
(2 + 5x) yd
(3 + 10x) 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.