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svetoff [14.1K]
2 years ago
12

Write the standard form of the equation of the circle with the given characteristics.

Mathematics
1 answer:
SOVA2 [1]2 years ago
7 0
<h2><u>Circle Equations</u></h2>

<h3>Write the standard form of the equation of the circle with the given characteristics.</h3><h3>Center: (0, 0); Radius: 2</h3>

To determine the equation of a circle, use the standard form of a circle (x - h)² + (y - k)² = r² where,

  • <u>(h, k)</u> is the center; and
  • <u>r</u> is the radius

Substitute the values of the center and radius to the standard form.

<u>Given:</u>

<u>(0, 0)</u> - <u>center</u>

<u>2</u> - <u>radius</u>

  • (x - h)² + (y - k)² = 2²
  • (x - 0)² + (y - 0)² = 4
  • x² + y² = 4

<u>Answer:</u>

  • The equation of the circle is <u>x² + y² = 4</u>.

Wxndy~~

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Answer:

191 people do not have a briefcase

Step-by-step explanation:

Proportion states that the two ratios or fraction are equal  

As per the given condition:

On the subway 8 out of 11 people are carrying a briefcase.

⇒Total number of people = 11

and number of people carrying a briefcase = 8

Remaining number of people that do not carrying a briefcase = 11-8 = 3

Now,

Based on this information, if there are 700 people on the subway

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By definition of proportion :

\frac{3}{11} = \frac{x}{700}

Multiply 700 both sides, we have

\frac{3}{11} \times 700 = x

Simplify:

x = 190.90≈ 191

Therefore, 191 people do not have a briefcase

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3 years ago
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A researcher drilled a hole in a die and filled it with a lead​ weight, then proceeded to roll it 209 times. The observed freque
ddd [48]

Answer:

Step-by-step explanation:

Given that the observed frequencies for the outcomes as follows:

To check this we can use chi square goodness of fit test.

H_0: equally likely\\H_a: not equally likely

(Two tailed test at 5% significance level)

Assuming equally likely expected observations are found out and then chi square is calculated as (0-E)^2/E

Df = 6-1 =5

Outcome Frequency Expected frequency (Obs-exp)^2/Exp

   

1 36 34.83333333 0.03907496

2 30 34.83333333 0.670653907

3 41 34.83333333 1.091706539

4 40 34.83333333 0.766347687

5 23 34.83333333 4.019936204

6 39 34.83333333 0.498405104

   

209 209          7.086124402

p value =0.214

Since p >alpha, we accept null hypothesis

It appears that the  loaded die does not behave differently than a fair​ die at 5% level of significance

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The marital status distribution of the U.S. male population, ages 15 and older, is as follows: 35.4% never married, 53.6% marrie
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The hypothesis illustrates that the males in the group don't follow a same distribution as all the males that are in the United States.

<h3>How to illustrate the information?</h3>

Based on the information given, it should be noted that the degree of freedom given in this case will be:

= 4 - 1

= 3

By using the Excel function, the p-value is given as 0.0002. In this case, we've to reject the null hypothesis if the p value is less than 0.1.

Therefore, we will reject the null hypothesis in this case. In inferential statistics, the null hypothesis is that two possibilities are the same. It is observed difference is due to chance alone. Using statistical tests, it is possible to calculate the likelihood that the null hypothesis is true

Therefore, the hypothesis illustrates that the males in the group don't follow the same distribution as all the males that are in the United States.

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4(x−5) <br> 2<br> =36<br><br> can i please get an answer to this
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Answer:

19/2 or 9.5

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

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Step 2: Add 40 to both sides.

8x−40+40=36+40

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Step 3: Divide both sides by 8.

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In order to calculate the volume of a cylinder, we can use the following formula:

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If the circumference is 8, we have:

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So the correct option is the second one.

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