Which if the following statements about streamlining is accurate? a. streamlining is the process of modifying only the frontal area to reduce drag.
b. Streamlining increases the low pressure area in the rear to push the car forward.
c. Streamlining will help an object in motion to cut through the air with less drag force
d. Streamlining increases air separation, thus reducing the drag coefficient.

Assume that there is a 4% 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 three independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?