The answer is A, because 43 of the flights were from UA and were on time, this is out of a whole of 87 flights.
Answer:
B) 7.5 in3
Step-by-step explanation:
Answer:
what is the question asked?
Step-by-step explanation:
Complete Question
The complete question is shown on the first uploaded image
Answer:
The calcium level that is the borderline between low calcium levels and those not considered low is 
Step-by-step explanation:
From the question we are told that
The mean is 
The standard deviation 
The proportion of the population with low calcium level is
5% = 0.05
Let X be a X random calcium level
Now the P(X < c) = 0.05
Here P denotes probability
c is population with calcium level at the borderline
Since the calcium level is normally distributed the z-value is evaluated as

The critical value for 0.05 from the standard normal distribution table is

=> 
substituting values

=> 
=> 
Answer: 0.83
Step-by-step explanation: