There are 12 children in the pool. Then 5 get out. Then 9 more jump in. How many children are in the pool now? 16 Write the number model. Is this 12-5+9=16 or 12-5=7 and then 7+9=16?

Ineed to learn how to solve this problem

Evaluate cos2θ for cosθ = square root of 3/2

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.