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2 years ago

Explain why x=4 is not in the domain of the function f(x)=√x-5 ?

Mathematics

1 answer:

lianna [129]2 years ago

6 0

Since we are dealing with a radical then x - 5 ≥ 0, for real values

x = 4 is less than 5 , hence is not in the domain

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450 high school freshmen were randomly selected for a national survey. Among survey participants, the mean grade-point average (

umka21 [38]

Answer:

The margin of error is of 0.01.

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:

$\alpha = \frac{1 - 0.7}{2} = 0.15$

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 $1 - 0.15 = 0.85$ , so Z = 1.037.

The margin of error is of:

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

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

Standard deviation was 0.21.

This means that $\sigma = 0.21$

Sample of 450:

This means that $n = 450$

What is the margin of error, assuming a 70% confidence level, to the nearest hundredth?

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

$M = 1.037\frac{0.21}{\sqrt{450}}$

$M = 0.01$

The margin of error is of 0.01.

4 0

3 years ago

9 divided by 622 long division

7nadin3 [17]

Your answer would have to be 69with the remainder of 1

(open the picture for the shown work :) )

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2 years ago

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Antonio and Candice had a race. Their distances past a particular landmark as the race progressed can be represented by linear f

Luda [366]

I got the answer Antonio had a head start of 3 meters.

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2 years ago

305/453 what is the percent to the neriest tenth

swat32

The answer is 67% because it rounds to 67%

5 0

3 years ago

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Why is it easy to calculate 5% of a number ? Give an Example

Alik [6]

5% of 1000 is 5 * 1000 / 100 = 5000 / 100 = 50.

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3 years ago