If your Disney vacation cost $6,198 and you normally make $21 per hour, how many total hours of overtime will you need to work to pay for it? Round your final answer to
the nearest whole hour.

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?