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Degger [83]
3 years ago
11

How many times greater is the value of the 7 in 171,889 than the value of the 7 in 117,889. Please help me!

Mathematics
1 answer:
9966 [12]3 years ago
8 0
I believe it is 10x greater
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Is 19 a prime number or composite?
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Prime, because the only number that can go into it are 19 and 1
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A square storage unit has a volume of 607.5 ft3. The height of the unit is 7.5 ft. What are the length and width of the storage
Eduardwww [97]

Answer:

9ft

Step-by-step explanation:

The base area of the storage is its volume divided by height

A = \frac{V}{h} = \frac{607.5}{7.5} = 81 ft^2

Since this base is a square, its length and width is of equal length, which is

\sqrt{A} = \sqrt{81} = 9ft

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john wants to buy a video game . the video game cost $59.95 and the sales tax is 5% . how much money will john need to purchase
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The spring concert at a certain high school sold 155 tickets. Students were charged ​$4 each and adults $8 each. The income from
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6 0
3 years ago
You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli
zhuklara [117]

Answer:

We need to sample at least 1069 parents.

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:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

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

In which \sigma is the standard deviation of the population and n is the size of the sample.

How many parents do you have to sample?

We need to sample at least n parents.

n is found when M = 4, \sigma = 79.5. So

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

4 = 1.645*\frac{79.5}{\sqrt{n}}

4\sqrt{n} = 1.645*79.5

\sqrt{n} = \frac{1.645*79.5}{4}

(\sqrt{n})^{2} = (\frac{1.645*79.5}{4})^{2}

n = 1068.92

Rounding up

We need to sample at least 1069 parents.

6 0
3 years ago
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