Ana drew a map of the panama canal. in the scale ana used for the map, 4 centimeters represents 20 kilometers. the actual length of the panama canal is 82 kilometers. what is the length in centimeters of the panama canal on ana’s map?

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?