4-5 and 3-6 are alternate interior angles
I’m pretty sure the answer would be Y=42°
Answer:

Step-by-step explanation:
Given that a shuttle launch depends on three key devices that may fail independently of each other with probabilities 0.01, 0.02, and 0.02, respectively.
Required probability = the probability for the shuttle to be launched on time
= Probability that all three do not fail
Since each key device is independent of the other
we have
prob that all three do not fail = 
Yea so whats the question or is that just a fact<span />