A. In circle O, segment CA and segment BD are diameters. OE is perpendicular to AD at F. If OE = 5 units, EF = 4 units and the measure of angle CED 18 degrees, find: Arc AD
Arc CD
Arc ACE
Angle COD
Angle DOE

Pl answer with solution

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?