Given: trapezoid riag with ri = rg = ga
m angel i = m angel nag
prove: angel t is approximately equal to angel n

provide reasonings for the following:

c. line rg is parallel to line ia
d. measure of angel trg equals measure of angel i
h. measure of angel tgr equals measure of angel nga
i. triangle tgr is approximately equal to triangle nga
j. angel t is approximately equal to angel n

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?