Ashley calculates her salary (base and commission) for the year "y" using the model y = 0.2x + 25,000; where x represents her total sales for the year. What is the meaning of the y-intercept in the model?

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.