An initial charge of $20 to create the silk
-$17.00 per shirt for orders of 50 or less
-$15.80 per shirt for orders of more than 50 shirts

write a piecewise function that gives the cost c for an order of x shirts

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?