Eden is cutting two triangular tiles for her bathroom. she needs the tiles to be congruent but is not sure she is cutting them that way. eden has ensured that one side of both tiles is congruent. which pair of sides would eden need to compare in order to make sure the triangles are congruent by hl?
ac and ef
ac and fd
bc and ef
bc and fd

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?