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3 years ago

Helppppppp meee plzz

Mathematics

2 answers:

Fiesta28 [93]3 years ago

6 0

Answer:

Diameter is 18.82ft

Step-by-step explanation:

The circumference is 59.1

divide the circumference by 3.14

59.1/3.14

to get the diameter of

18.821656....

Mrac [35]3 years ago

5 0

Answer:

it think its c dont get mad if i am wrong

Step-by-step explanation:

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When 9 is subtracted from a number and then divided by 2, the answer is<br> 4. What is the number?

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That doesn’t make since

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The unit rate of change of y with respect to x is the

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4 years ago

Five hundred people attend a charity event, and each buys a raffle ticket. The 500 ticket stubs are put in a drum and thoroughly

AURORKA [14]

Answer:

The sample is a Simple Random sample.

explanation:

A simple random sample is the process where there is equal chance of selecting each member of a population to form a sample. in the example stated in the question there are equal chances of selecting every ticket among the five hundred ticket of the participant so as to form another set of ten tickets that win a prize.

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3 years ago

How are a common denominator and a common multiple alike and different?

victus00 [196]

East common multiple is the smallest multiple both numbers can go into. (Example: the LCM of 10 and 4 is 20, because both 10 and 4 go into 20 and 20 is the smallest number both 10 and 4 can go into. You could just multiply them both, but you'd get 40 and since its a bigger number it would be harder to work with.)

<span>Least common denominator is just the least common multiple as a denominator. (Example: if you wanted to find the LCD of 5/7 and 1/10, you'd have to find the LCM of the demoniators (7 and 10) and then just use that as the denominator when adding fractions with unlikely denominators.) Sorry for such a long answer :P</span>

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4 years ago

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Gabriella asked 555 of her hundreds of coworkers how much storage space they were currently using on their computer. Here are th

Vitek1552 [10]

Answer:

The standard deviation of the sample is 2.55 gigabytes

Step-by-step explanation:

Here we have the responses as follows;

Storage space usage on their computer $x_i$

The number of respondents or sample size, n = 5

$x_i$ $(x_i - \bar x)$ $(x_i - \bar x)^{2}$

4 -4 16

8 0 0

9 1 1

11 3 9

∑ 40 26

The sum = ∑X = 4 + 8 + 8 + 9 + 11 = 40

The mean = (The sum)/(The count) = 40/5 = 8

Formula for population standard deviation is;

$\sigma = \sqrt{\frac{\Sigma (x_i - \mu)^2}{n } }$

Where:

σ = Population standard deviation

μ = Population mean

Since we are dealing with only 5 out of her hundreds of coworkers we are dealing with a sample therefore;

The formula for sample standard deviation is;

$s = \sqrt{\frac{\Sigma (x_i - \bar x)^2}{n - 1} }$

Where:

s = Sample standard deviation

n = Sample size

$x_i$ = Each value of the sample

$\bar x$ = Sample mean

We find each value of $(x_i - \bar x)$ by subtracting the x values from the mean, 8, as in the table above, next we find $(x_i - \bar x)^{2}$ by squaring the $(x_i - \bar x)$ .

Next, we find the sum of the differences from the mean square values from the table after which we divide by n - 1, to get ${\frac{\Sigma (x_i - \bar x)^2}{n - 1} } = \frac{26}{5 - 1} = \frac{26}{4} = 6.5$

We find the root of the result which gives us the standard deviation hence

√6.5 = 2.5495.

Standard deviation, s = 2.5495 ≈ 2.55 to two significant places of decimal.

3 0

4 years ago