Answer:
20 miles per hour
Step-by-step explanation:
traveling against the wind was 160mph (400/2.5)
traveling with the wind was 200mph (400/2)
going against the wind is going in the negative direction of the wind speed, and going with the wind is going in a positive direction of the wind speed, therefore the wind speed is |direction1-direction2|/2, which would be |200-160|/2 = |40|/2 = 20mph
(180mph is neutral speed with no wind, with wind affecting this neutral speed ±20mph)
Answer:
1+2=3 is answer
Step-by-step explanation:
so what help u need?
Answer:

And we can use the following z score:

And replacing we got using the normal standard distribution table or excel:

C.0.8413
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the records of a population, and for this case we know the distribution for X is given by:
Where
and
Since the distribution for X is normal then we know that the distribution for the sample mean
is given by:
We select a sample of size n=36, and we want to calculate this probability:

And we can use the following z score:

And replacing we got using the normal standard distribution table or excel:

C.0.8413
The answers is 0.5 or 1/2
Answer:
Sorry but I don't know :(
Step-by-step explanation: