Do you ever just like don't like white people sometimes? just me?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Opposite angles in a parrellelogram are

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?