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vredina [299]
2 years ago
15

Mal works at a photo gallery. He charges $50 for a large photo and $40 for a large frame. Sales tax is 5%.

Mathematics
2 answers:
mixer [17]2 years ago
3 0

Answer:

94.50

Step-by-step explanation:

spayn [35]2 years ago
3 0

Answer:

$94.50

Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
Suppose that scores on the mathematics part of a test for eighth-grade students follow a Normal distribution with standard devia
riadik2000 [5.3K]

Answer:

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Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, find M as such

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M = z*\frac{\sigma}{\sqrt{n}}

20 = 1.645*\frac{150}{\sqrt{n}}

20\sqrt{n} = 1.645*150

\sqrt{n} = \frac{1.645*150}{20}

\sqrt{n} = 12.3375

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zepelin [54]

Answer:

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Step-by-step explanation:

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