The area of a square piece of cardboard is 81 square inches. what is the length of the cardboard? a. 10 inches b. 9 inches c. 8 inches d. 20.25 inches

When y’all answer can y’all explain too !

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?

Flvs question 3 exam: 04.10 segment one exam part two what is the measure of angle x? picture is shown