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2 years ago

PLS I NEED HELP CIRCUMFERENCE

Mathematics

1 answer:

I am Lyosha [343]2 years ago

7 0

Answer:

131.88 inches

Step-by-step explanation:

Circumfrnce formula is diameter * π

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PLEASE HELP! 40 POINTS

Vedmedyk [2.9K]

I'd start with setting up the equations. Calling x the number of students in most popular country 1, and y in country 2.

x + y = 44740

x - y = 5672

now solve for x1 and x2. You can subtract second from first:

0 + 2y = 39068

y = 19534

x = 5672 + 19534 = 25206

Add a sentence to answer it in words.

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2 years ago

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All of the following types of graphs are used to represent numerical data except a _____.

tester [92]

I am unsure but i think the answer is c or a but let me know if i'm right or wrong

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3 years ago

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What is 70/6 as a mixed number

bija089 [108]

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70/6=11.666666...
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The answer is 11 2/3.

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3 years ago

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Determine the slope of the line that contains the given points. <br><br> <img src="https://tex.z-dn.net/?f=G%28-4%2C3%29%2C%20H%

stealth61 [152]

I believe the slope is Undefined.

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2 years ago

Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a

Brums [2.3K]

Answer:

The minimum sample size is $n =135$

Step-by-step explanation:

From the question we are told that

The confidence interval is $( lower \ limit = \ 0.44,\ \ \ upper \ limit = \ 0.51)$

The margin of error is $E = 0.1$

Generally the sample proportion can be mathematically evaluated as

$\r p = \frac{ upper \ limit + lower \ limit }{2}$

$\r p = \frac{ 0.51 + 0.44}{2}$

$\r p = 0.475$

Given that the confidence level is 98% then the level of significance can be mathematically evaluated as

$\alpha = 100 - 98$

$\alpha = 2\%$

$\alpha =0.02$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

The value is

$Z_{\frac{\alpha }{2} } = 2.33$

Generally the minimum sample size is evaluated as

$n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )$

$n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )$

$n =135$

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3 years ago