Answer this each day that a library book is kept past it's due date a $0.30 figures charged at midnight which ordered pair is viable solution if x represents the number of days that a library book is lat and y represents the total fee.( -3-0..5-0.75)(4.5, 1.35) (8,240)

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?