A right triangle has one leg that measures 7 inches and the hypotenuse measures 12 inches. What is the length of the other leg?
Round your answer to the nearest hundredth.
Answer with a numeric value only. That is, do not include "in" or "inches" with your response.

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?