Need answer now! michelle jumps from a plane at an altitude of 1000 m. after 10 seconds her parachute opens. the graph shows the relationship between her altitude and time. how long does it take for her to be half way between the plane and the ground? 

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?