Kai had a gross weekly paycheck of $616 last week. kai worked 6 hours for 4 of the days and 8 hours on 1 day. what is kai's hourly rate of pay?

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?