HELP Two buildings are 42m apart. From the roof of the shorter building,
the angle of elevation to the top of the taller building is 14 and the
angle of depression to the base of the taller building is 29. Find the
height of the buildings to the nearest hundredth of a metre.

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?