Mari works at a jewelry store. She has worked 30 hours this week with a total sales amount of $35,000. How much does she earn if her company pays the greater of either $100 weekly or 3.5% commission?
$2225
$1225
$12,250
$1000

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?