Kevin is a songwriter who collects royalties on his songs whenever they are played in a commercial or a movie. Kevin will earn $50 every time one of his songs is played in a commercial and he will earn $150 every time one of his songs is played in a movie. Kevin's songs were played on 6 more commercials than movies, and his total earnings on the royalties from all commercials and movies was $900.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

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?