Find the volume of a pyramid with a square base, where the perimeter of the base is 13.4 in and the height of the pyramid is in 7.6 in. Round your answer to the nearest tenth of a cubic inch.

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?