It took Azul 1.75 hours to bike The Blue Mountain Trail. Azul averaged 12.5 miles per hour. What is the best estimate for the length of the trail? A:between 1 and 13 B:between 2 and 20 C:between 12 and 26 D:between 25 and 35

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?