Draw a quick picture to find the sum or difference 2.46 + 0.78

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

3x = 729 solve for x plz . it's urgent. will mark

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?