(you can zoom in) can someone explain why this is wrong? ? ( pythagorean theorem )

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 you find the magnitude of a vector, v = < x, y > , where the horizontal change is x and the vertical change is y?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1