Two phone companies are advertising new rates to their customers. company a charges a sign-up fee of $8.00 and $0.40 per minute of talk time. company b charges a sign-up fee of $12.00 and $0.20 per minute of talk time. how many minutes must customers talk in order for the total cost at company a and company b to be the same?

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.