The air plane altitude is -54 feet per minute
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 = 
3.01 as a mixed number is 3 and 1/100
It is 1/100 because the 1 is in the hundredths place