23. The wallpaper border that runs all the way around a room is 5f2 + 198+11 long. Three sides of the room have the following lengths of border: 6f, 58 - 7,
2f2 + 2. What is the length of the fourth side of the room?

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

How many terms does the polynomial x^2 y^2 have

From the top of a tree a bird looks down on a field mouse at an angle of depression of 50°. if the field mouse is 40 meters from the base of the tree, find the vertical distance from the ground to the bird's eyes.