Quadrilateral abcd is a trapezoid with an area of 20 cm². find the height of the trapezoid, h. round the answer to the nearest tenth.

How to determine whether two known pairs of points are on the same line.

Is the square root of 4 plus the square root of 16 rational?

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.