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Lyrx [107]
3 years ago
15

How do you calculate how many tenths are in 20.4?

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
8 0
\frac{20.4}{\frac{1}{10}}=\\
20.4\cdot10=\\
204
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Answer:

b

Step-by-step explanation:

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2 years ago
The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c
siniylev [52]

Answer:

19 beers must be sampled.

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 Z-table as such z has a p-value of 1 - \alpha.

That 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.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that \sigma = 0.26

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

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

0.1 = 1.645\frac{0.26}{\sqrt{n}}

0.1\sqrt{n} = 1.645*0.26

\sqrt{n} = \frac{1.645*0.26}{0.1}

(\sqrt{n})^2 = (\frac{1.645*0.26}{0.1})^2

n = 18.3

Rounding up:

19 beers must be sampled.

7 0
2 years ago
X÷0.4=2 1/9 ÷3 1/6? What does x equal? Explain your answer thoroughly.
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I would recommend calculatorsoup.com for the fractions part.
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Which expression is equivalent to 2la+26)-2-26?
snow_tiger [21]

Answer:

Dear user,

Answer to your query is provided below

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3 years ago
How to find the inverse of g(x) = -3 +(3/5)x​
nasty-shy [4]

Answer:

g^-1(x)=5x/3 +5

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