Paula dives into a swimming pool from a diving board 2 feet above water's surface. She descends to a depth of 7 feet below the diving board. How far is Paula from the surface of the water? 1. What integer represents Paula's height above the water?
2. What integer represents Paula descend?
3. Write an additional expression to represent Paula's distance below water's surface?
4.

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?