(a) what is the probability that a drought lasts exactly 3 intervals? at most 3 intervals?

One integer is 8 times another. if the product is 72, then find the integers

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}