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Arisa [49]
2 years ago
13

Helllppppp meee please

Mathematics
2 answers:
sleet_krkn [62]2 years ago
6 0

Answer:

Option B is the correct answer

Step-by-step explanation:

Hope it helps you in your learning process.

\tan 30\degree=\frac{17}{x}

\implies\frac{1}{\sqrt 3}=\frac{17}{x}

\implies\huge{\red{ x={17\sqrt 3}}}

\sin 30\degree=\frac{17}{y}

\implies\frac{1}{2}=\frac{17}{y}

\implies\huge{\purple{ y={34}}}

IrinaVladis [17]2 years ago
4 0

Answer:

B

Step-by-step explanation:

It would be using the law of sines.

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The mean per capita income is 23,037 dollars per annum with a variance of 149,769. What is the probability that the sample mean
mihalych1998 [28]

Answer:

Probability that the sample mean would be less than 23,013 dollars is 0.2358.

Step-by-step explanation:

We are given that the mean per capita income is 23,037 dollars per annum with a variance of 149,769.

Also, a sample of 134 persons is randomly selected.

Firstly, Let \bar X = sample mean

The z-score probability distribution for sample mean is given by;

              Z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

where, \mu = population mean per capita income = 23,037 dollars p.a.

           \sigma = standard deviation = \sqrt{Variance} = \sqrt{149,769} = 387 dollars p.a

           n = sample of persons = 134

So, probability that the sample mean would be less than 23,013 dollars is given by = P(\bar X < 23,013 dollars)

      P(\bar X < 23,013) = P( \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } < \frac{23,013-23,037}{\frac{387}{\sqrt{134} } } ) = P(Z < -0.72) = 1 - P(Z \leq 0.72)

                                                                    = 1 - 0.7642 = 0.2358

The above probability is calculated using the z-score table.

<em>Therefore, probability that the sample mean would be less than 23013 dollars if a sample of 134 persons is randomly selected is 0.2358.</em>

4 0
3 years ago
Round 22.89 to the nearest whole number
VashaNatasha [74]

Answer:

23

Step-by-step explanation:


3 0
3 years ago
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Which of the following properties is shown in the question below?
trapecia [35]

Answer:

C. Associative property of multiplication

Step-by-step explanation:

The associative property of multiplication states that the way in which factors are grouped in a multiplication problem does not change the product.

7 0
3 years ago
Please dont let this go by.. I really need help
matrenka [14]

What do you need help with?

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3 years ago
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There is a multiplication and division fact family with the numbers 2,4 and 8. Write the four fact family members
DanielleElmas [232]

Answer:

8-4=2

2 x 4=8

4 x 2=8

8-2=4

Step-by-step explanation:

6 0
4 years ago
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