A company estimates that the marginal cost (in dollars per item) of producing x items is 1.76 − 0.004x. If the cost of producing one item is $552, find the cost of producing 100 items. Step 1
The marginal cost function is the derivative of the cost function C(x). So we know that
C '(x) = 1.76 − 0.004x.?

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?