NEED HELP ASAP!!
What is the perimeter of the green rectangle?

Determine the solution for mc001-1.jpeg

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?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25