A 50 foot ladder is leaning against a vertical wall. If the base of the ladder is 45 feet from the base of the wall, find the angle of elevation from the bottom of the ladder to where it reaches on the wall.

Which fraction below is equivalent to 10/12?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

How can i differentiate this equation?