Answer:
<h2>12.56 m</h2>Step-by-step explanation:
The formula of a circumference of a circle:
<em>d</em> - <em>diameter</em>
<em />
We have <em>d = 4m</em>.
Substitute:
Use 3.14 for π:
A car's speed is 45 miles per hour. How far will it go in 4 hours and 20 minutes?
2 answers:
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Answer:
And we can find this probability using the complement rule and we got:
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 weights of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and we got: