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bixtya [17]
2 years ago
10

Help........................

Mathematics
1 answer:
MrRissso [65]2 years ago
5 0

since the powers are same, ignore 'em , and let's calculate the bases.

-16.(1/2)

-8.1 (upon cancellation)

ans = -8

hope it helps...!!!

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The owner of Matt’s Gas Station wants to study gasoline purchases of customers at his station. In 2017, the mean amount of gas
gulaghasi [49]

Answer:

Step-by-step explanation:

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For the null hypothesis,

µ = 9

For the alternative hypothesis,

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This is a 2 tailed test

Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is

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Since the curve is symmetrical and it is a two tailed test, the x value for the left tail is 9 - 0.9 = 8.1

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These means are higher and lower than the null mean. Thus, they are evidence in favour of the alternative hypothesis. We will look at the area in both tails. Since it is showing in one tail only, we would double the area. We already got the area above the z score as z = 0.00539

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But we are told to use the critical value approach, then

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The z score for an area to the right of 0.995 is 2.575

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Margin of error = z × σ/√n

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Answer:


Step-by-step explanation:

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<h3>What is the arrangements formula?</h3>

The number of possible arrangements of n elements is given by the factorial of n, that is:

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In this problem, the first digit has to be 5, while the other three are arranged, hence the total number of arrangements is given by:

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More can be learned about the arrangements formula at brainly.com/question/25925367

#SPJ1

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