What did wegener call this giant land mass

Assume that there is a 4% 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 three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

How often does colleges update the cost of attendance on their website? . a)every two years b) every four years c) every year d) every semester

In simple terms, how would you define a protocol?