You charge $2.50 per hour for each child you babysit. You also earn an activity fee of $2.75 for each hour. You babysit an average of 10 hours a month. Write an expression using the product of two factors to find how much you will earn on average each month for any number of children c.

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.