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DaniilM [7]
2 years ago
14

Help^^^^^^^^^^^^^^^^^

Mathematics
1 answer:
Natalka [10]2 years ago
6 0
Answer: choice D

----------------------------------------------

Work Shown:

I'm assuming the problem is -4*(1-x) <= -12+2x where the first term is -4 and not 4

-4*(1-x) <= -12+2x
-4*(1-x) <= -12+2x
-4+4x <= -12+2x
-4+4x-2x <= -12+2x-2x
-4+2x <= -12
-4+2x+4 <= -12+4
2x <= -8
2x/2 <= -8/2
x <= -4

To graph x <= -4, you plot a closed circle at -4. Then you shade to the left of the closed circle. This matches with choice D
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The closest to the maximum profit is  x = \$ 83682

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From the question we are told that

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   The standard deviation is  \sigma  = \$ 21000

   The percentage of profit is  20%

Generally the closest to the maximum annual profit at a store where the executives conducted an audit is mathematically evaluated  as follows

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=>  P(X >  x ) = P(\frac{X -x}{\sigma }  >  \frac{x -66000}{21000} ) =  0.20

From the z-table  the z-score for  0.20  is  

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Answer:

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The null hypothesis is a general statement that there is no relationship between two measured instances or no association among groups.

In this case, the sales of a grocery store had an average of $7,000 per day is the null hypothesis. Then the research was carried out to test for the effectiveness of the advertising campaigns in increasing sales.

Thus, this is the alternative hypothesis. The researchers wish to test against the null with regards to the involvement of the advertising campaigns.

Thus, the null hypothesis is just the average sales without the advertising campaigns which is

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Answer:

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