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
as
px + 10
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

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?