Leah and her children went into a restaurant and will buy hotdogs and tacos. She must buy a maximum of 13 hotdogs and tacos altogether. Write an inequality that would represent the possible values for the number of hotdogs purchased, h, and the number of tacos purchased, t.

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?