Is 3pi rational, or irrational? 3π

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.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

What is the prime factorization of 230