A/b=c solve for b what is the correct answer for the given question

Which of the following circles have their centers in the third quadrant?

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?

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)