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3 years ago

What is pie time 23.9817

Mathematics

2 answers:

Wittaler [7]3 years ago

8 0

Pie is always 3.14 so to find pie you multiply Pie Multiplied by a Total

So-...

3.14π × 23.9817= 236.5699

Burka [1]3 years ago

8 0

Answer:

23.9817*3.14=75.3*pi=236.56

Step-by-step explanation:

hey rod im shawnte how ya been

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The answer would be $112.
explanation:
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3 years ago

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4 years ago

(5 over 3 + 4 over 3) ×3 =

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Answer:

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Step-by-step explanation:

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3 years ago

Suppose that a researcher is planning a new study on hemoglobin levels amongst women under 25 years old. Previous research sugge

Mariulka [41]

Answer:

A sample size of at least 531 is required.

Step-by-step explanation:

We are lacking the confidence level to solve this question, so i am going to use a 90% confidence level.

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Find the required sample size for the new study.

A sample size of at least n is required.

n is found when $M = 0.05$

We have that $\sigma = 0.7$

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.05 = 1.645*\frac{0.7}{\sqrt{n}}$

$0.05\sqrt{n} = 1.645*0.7$

$\sqrt{n} = \frac{1.645*0.7}{0.05}$

$(\sqrt{n})^{2} = (\frac{1.645*0.7}{0.05})^{2}$

$n = 530.4$

Rounding up

A sample size of at least 531 is required.

5 0

3 years ago

the graph shows proportional relationship between the variables y and x. write an equation to model the relationship.use pencil

adelina 88 [10]

Answer:

y = 11x

Step-by-step explanation:

I know there is a proportional relationship because the line is straight and passes the Origin (graph) or has the same unit rate (table).

8 0

3 years ago