If it takes 7 hours to mow 4 lawns st the rate how many lawns could be mowed in 35 hours

Two lines parallel to the same plane are parallel to eachother

Which value would be a solution for x in the inequality 47-4x< 7

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?