Please help me with this

What is the measure of angle afe? 79 81 91 99

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 number line represents the solution set for the inequality -1/2x> 24?