Lin understands that expanding is using the distributive property, but she doesn't understand what factoring is or why it works. How can Kiran explain factoring to Lin? Lin asks Kiran how the diagrams with boxes help with factoring. What should Kiran tell Lin about the boxes?

Lin asks Kiran to help her factor the expression - 4xy-12x2 + 20xw. How can Kiran use this example to Lin understand factoring?​

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?