Which events occurred during the Space Race? Check all that apply.
development of a rover to land on Mars
advancements in spy satellite technology
design and building of an international space station
improved technology for sending living things into orbit
creation of a landing module that could fly back to the ship in orbit

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?