Find all the missing angles

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

What is the equation of the graph below? y=sec(x)-4

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.