Expression for the area of the rectangle shown. (A = length x

Mathematics

1 answer:

Mamont248 [21]3 years ago

5 0

4(8x-2)
Distribute the 4
So it should be 32x-8

Hope it helps

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Find two complex numbers that have a sum of 10i, a difference of -4, and a product of -29

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A consumer survey indicates that the average household spendsμ= $185on groceries each week. The distribution of spending amounts

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Answer:

$P(X>200)=P(\frac{X-\mu}{\sigma}>\frac{200-\mu}{\sigma})=P(Z>\frac{200-185}{25})=P(Z>0.6)$

And we can find this probability using the complement rule and with the normal standard table or excel:

$P(Z>0.6)=1-P(z$

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:

$X \sim N(185,25)$