Insert 2 sets of parentheses to make each sentence true: 2 x 14 – 9 – 17 – 14 = 7 (2 x 14) – 9 – (17 – 14) = 7 2 x (14 – 9) + (–
1 answer:
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Answer:
a) Let X the random variable that represent the blood pressure for people of a population, and for this case we know the distribution for X is given by:
Where and
b)
And we can find this probability using the complement rule:
And in order to find this probabilities we can use tables for the normal standard distribution, excel or a calculator.
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".
Part a
Let X the random variable that represent the blood pressure for people of a population, and for this case we know the distribution for X is given by:
Where and
Part b
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 in order to find this probabilities we can use tables for the normal standard distribution, excel or a calculator.
Answer:
The length of one side of sandbox is .
Step-by-step explanation:
Given:
Perimeter of Pentagon =
We need to length of one side of sand box.
Solution:
Now it has been given that sand box is in the shape of regular pentagon.
The length of all side of regular pentagon are equal.
Let the length of side of the sandbox be 's'.
Now we know that;
Perimeter of regular pentagon is equal to five times its side length.
so equation can be framed as;
Now taking 5 common on the right side we get;
Dividing both side by 5 we get;
Hence The length of one side of sandbox is .