What is the simplified for of the equation 3• (5+2)-12?
1 answer:
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Given:
The statement is "-3 raised to the power 0".
To find:
The value of the given expression.
Solution:
We know that raised to the power
can be written as
.
Any non zero number raised to the power 0 is always 1. It means,
, where
.
-3 raised to the power 0
Therefore, the value of the given statement is 1.
Answer:
And we can find this probability using the complement rule and with the normal standard table or excel:
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 average household spent 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 with the normal standard table or excel: