The length of the rectangle is 3 times the width. The perimeter is 65.6cm. find the width
1 answer:
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Answer:
And we can find this probability with the following difference and using the normal standard table or excel we have:
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 variable of interest 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 with the following difference and using the normal standard table or excel we have:
Answer:
Table B
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or
<em>Verify table B</em>
For ----->
For ----->
For ----->
For ----->
The values of k are the same
therefore
The table B shows y as DIRECTLY PROPORTIONAL to x
<em>Verify table D</em>
For ----->
For ----->
For ----->
For ----->
the values of k are different
therefore
The table D not shows y as DIRECTLY PROPORTIONAL to x