Given the characters A, B, C, H, I, T, U, V, 1, 2, 3, and 4, how many seven-character passwords can
be made? (No repeats are allowed.) How many if you
have to use all four numbers as the first four characters
in the password?

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

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?