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Karo-lina-s [1.5K]
3 years ago
7

Find the missing value to the nearest hundredth.

Mathematics
1 answer:
AVprozaik [17]3 years ago
6 0

Answer:

D.) 89.33°

Step-by-step explanation:

Use the inverse:

X=tan^{-1}(86)

Insert this value into a calculator:

X=89.333

Round to the nearest hundredth:

X=89.33

The missing value is 89.33°.

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A polygon is regular if each of its sides has the same length. Find the perimeter of the regular polygon. #36
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3 years ago
The first eight quizzes in this class had average scores of 8,9,9,8,8,9,8,7. This gives a sample mean of 8.25 and a sample stand
alexira [117]

Answer:

<em>Test statistic </em>

<em>               </em>t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }  

            t = <em>1.076</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given Mean of the Population (μ) = 8.0

<em>Mean of the sample (x⁻) = 8.25</em>

Given data

                  8,9,9,8,8,9,8,7

Given sample size  n= 8

Given sample standard deviation(S) = 0.661

<u><em>Step(ii):-</em></u>

<em>Null hypothesis : H:  (μ) = 8.0</em>

<em>Alternative Hypothesis :H:(μ) > 8.0</em>

<em>Degrees of freedom = n-1 = 8-1=7</em>

<em>Test statistic </em>

<em>               </em>t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }<em></em>

<em>              </em>t = \frac{8.25 -8.0}{\frac{0.661}{\sqrt{8} } }<em></em>

<em>            t =  1.076</em>

<em>Critical value </em>

<em>                    t₍₇,₀.₀₅₎   = 2.3646</em>

<em>The calculated value   t =  1.076 < 2.3646 at 0.05 level of significance</em>

<em>Null hypothesis is accepted</em>

<em>Test the hypothesis that the true mean quiz score is 8.0 against the alternative that it is not greater than 8.0</em>

<em></em>

3 0
3 years ago
A TV station wants to conduct a survey to determine which sport should be shown on Sunday in the viewing area: a football game o
love history [14]

Answer:

I'm not completely sure about this. The answer is B.) Sample 2: 50 boys and 50 girls at the local middle school. :)

Step-by-step explanation:

8 0
3 years ago
Leila and jo are two of the partners in a business. Leila makes $3 in profits for every $4 that jo makes. If jo makes $60 profit
Aleonysh [2.5K]

Let

x-------> Leila 's profit

y------> Jo's profit

we know that

\frac{x}{y} =\frac{3}{4} ----------> equation 1

For y=\$60

<u>Find the value of x</u>

Substitute the value of y in the equation 1

\frac{x}{60} =\frac{3}{4}

x=60*\frac{3}{4}

x=\$45

therefore

<u>the answer is</u>

Leila make \$45 in profit

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3 years ago
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Given two different circles O and Q, which of the following cases presents two circles with no (zero) common tangents?
borishaifa [10]
Concentric circles because if a line is tangent to one circle, it would only intersect teh other 
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