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3 years ago

6

the ratio of goats to sheep at a university research farm is 4: 7. The number of sheep at the arm is 28. what is the number of g

oats?

1 answer:

GalinKa [24]3 years ago

4 0

4+7=11 i.e. The whole.
7/11=28

1/11=4
Goats are 4/11 therefore
4 x 4= Ans
All the animals add up to 44 and if you check w/ 7/11 it is correct.

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3 years ago

What is the equation of the line in point-slope form?

evablogger [386]

Answer:

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Step-by-step explanation:

Given

The attached graph

Required

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From the graph, we have the following points;

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$(x_2,y_2) = (100,-500)$

First, we calculate the slope (m):

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2 years ago

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3 years ago

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3 years ago

Read 2 more answers

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fenix001 [56]

Answer:

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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:

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

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.

$M = 1.645*\frac{1.9}{\sqrt{4500}} = 0.04$

The lower end of the interval is the sample mean subtracted by M. So it is 5.4 - 0.04 = 5.36 years.

The upper end of the interval is the sample mean added to M. So it is 5.4 + 0.04 = 5.44 years.

The 90% confidence interval for the mean time required by all college graduates is between 5.36 years and 5.44 years.

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3 years ago