Kyle is working on his model railroad set that his grandfather gave him. the miniature train engineer is 0.43 inches wide and 1.02 inches tall. up to how much area in this display case with the engineer take?

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?