Ali runs five days a week at the local park's nature trail. the circular trail is 440 yards long. each day that ali runs, she runs 12 laps around the trail. how many miles does ali run on the trail in one week?
a
9 miles

b
12 miles

c
15 miles

d
18 miles

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?