Amusic school charges a registration fee in addition to a fee per lesson. music lesson last 0.5 hour. the equation y=40 x+30 represents the total cost y if x lesson. find and interpret the slope and y-interpret of the line that represents this situation. then find four points on the line.

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?