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3 years ago

50 POINTS!!!!!!!! ANSWER PLEASE

Mathematics

2 answers:

sdas [7]3 years ago

5 0

Answer:

15 is the number that forms the ratio 3/7 of 35

follow the column up until the row 3

maxonik [38]3 years ago

3 0

Answer:

Step-by-step explanation:

15 is the number that forms the ratio 3/7 of 35

follow the column up until the row 3

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Plz help idk what this is even about

AysviL [449]

I think the answer is A.

It's probably wanting you to use pythagorean theorem.

6 0

3 years ago

What are the steps for solving, 7,542÷3

valina [46]

Answer:

2514

Step-by-step explanation:

Do the long division and you'll find the answer.

8 0

3 years ago

you want to create a 99 confidence interval with a margin of error of 25 assuming that the population standard deviation is equa

Ahat [919]

Answer:

The minimum sample size is 239.

Step-by-step explanation:

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

$\alpha = \frac{1 - 0.99}{2} = 0.005$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

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.

Population standard deviation is equal to 1.5

This means that $\sigma = 1.5$

Margin of error of 0.25

This means that $M = 0.25$

What's the minimum size of the sample?

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

$0.25 = 2.575\frac{1.5}{\sqrt{n}}$

$0.25\sqrt{n} = 2.575*1.5$

$\sqrt{n} = \frac{2.575*1.5}{0.25}$

$(\sqrt{n})^2 = (\frac{2.575*1.5}{0.25})^2$

$n = 238.7$

Rounding up:

The minimum sample size is 239.

4 0

3 years ago

The mass of the particles that a river can transport is proportional to the sixth power of the speed of the river. A certain riv

katrin2010 [14]

Answer:

7.25

Step-by-step explanation:

200m/s^6 = m/3^6

s^6 = 200*3^6

s = 3*200^(1/6) = 7.25 mi/hr

Hope I helped!

8 0

3 years ago

Write an equation for the relationship between time and distance for each horse

alexandr402 [8]

Idekxbbdbdbdbbddbbddbbdd

6 0

3 years ago