Find area of the triangle 15ft 10ft 10ft

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.

Just tell me how to set up the equation.

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?