Jenny and Johnny are planning their wedding. They do not want to spend more than y dollars for the band and the food at the reception. The band charges $3,500 for the night and the food costs $25 per person. Which of the following inequalities represents this situation, where x is the number of people they invite? A. $3,500 + $25x > y B. $25 + $3,500x > y C. $25 + $3,500x < y D. $3,500 + $25x < y

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?