63 is 90 percent of what number

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.

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

What term makes it inconsistent y=2x - 4