Answer:
0.9812
Step-by-step explanation:
Given that human weights are normally distributed with mean 175 and standard deviation 36 pounds
For a sample of 9 people std error of sample would be

Thus we find that sample mean is N(175, 12)
The plane will lift safely if sample average <200 pounds
i.e. Probability that it can safely lift off (i.e., the average weight of a person in the helicopter is less than 200)
= 
~0.981
Answer:
yes it is correct
Step-by-step explanation:
subtract |p| from |p+q| to get |q|
3×2=692047 82837=284749×2484r133.e9274
Answer is A, 10.4L per 100km