The expression -260 + 16y represents a submarine that began at a depth of 260 feet below sea level and ascended at a rate of 16 feet per minute. What was the depth of the submarine after 8 ​minutes?(Answer Soon PLEASE)

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?