Use the model showing 2 wholes divided into thirds to find the quotient 2 ÷ 1 3 . Select the correct response below. 2 equal-sized circles are shown next to each other. Both are divided into three equal parts. All parts are colored yellow. A. 2 3 B. 3 2 C. 1 6 D. 6

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?