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diamong [38]
3 years ago
6

PLEASE HELP!!!

Mathematics
1 answer:
emmainna [20.7K]3 years ago
4 0

Answer:

B. y= -½x + 11

Step-by-step explanation:

_______________

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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
3 years ago
Please explain how you got your answer! ​
Alla [95]

Answer: b =50°

Step-by-step explanation:

The angles on a straight line =180°

180° = 50°+90°+b

180°-50°-90°=b

50° = b

4 0
3 years ago
Read 2 more answers
PLEASE HELP PLEASEE!!!!!!!!!!!!!!
Yakvenalex [24]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
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Wich expression is equivalent to 5 (4r + 2s) - 3?​
katen-ka-za [31]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
Which mathematical property is demonstrated?
Kazeer [188]
40 * (25 * 74) = (40 * 25) * 74

40 * (1850) = (1000) * 74

40 * (1850) = (1000) * 74

74,000 = 74,000

Knowing this, we can easily conclude that this is demonstrating the associative property of multiplication. The associative property of multiplication states that the product is the same regardless of their grouping. In this case, after simplifying the expression given, we can see that indeed the products are the same hence that fact that they have different grouping. 
7 0
3 years ago
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