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navik [9.2K]
3 years ago
13

4. State the number of positive real zeros for the polynomial

Mathematics
1 answer:
Sophie [7]3 years ago
6 0
I believe the answer is c.
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Of the population of all fruit flies we wish to give a 90% confidence interval for the fraction which possess a gene which gives
Eva8 [605]

Answer:

The margin of error for the 90% confidence interval is of 0.038.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

To this end we have obtained a random sample of 400 fruit flies. We find that 280 of the flies in the sample possess the gene.

This means that n = 400, \pi = \frac{280}{400} = 0.7

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

Margin of error:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 1.645\sqrt{\frac{0.7*0.3}{400}}

M = 0.038

The margin of error for the 90% confidence interval is of 0.038.

8 0
2 years ago
PLEASE HELP!!!! I'LL GIVE BRAINLIEST NO LINKS OR YOU'LL BE REPORTED:)))))))))) Describe the distributive property. How is it dif
nadezda [96]

Answer:

when u distribute a number you are basically giving the number off and multiplying other factors by that number

Step-by-step explanation:

3(x+4) ( distribute the 3 ) so u would multiply the 3 by both factors ( the x and the 4) getting 3x+12

7 0
3 years ago
Is 6(x+0.4) equivalent to 3(2x+0.8)? YES or NO???????
amm1812

Answer:

Yes

Step-by-step explanation:

If we multiply them out, we get 6x + 2.4 for the first one and 6x + 2.4 for the second one, therefore they are the same.

3 0
2 years ago
How do you solve 1/18 - 1/30 using prime factorization
Paraphin [41]
I hope this helps you

6 0
3 years ago
Which of the following provides sufficient information to write the equation of any circle? A. the x-intercept B. the y-intercep
velikii [3]
The standard equation of the circle may be determined through the expression,
                              (x - h)² + (y - k)² = r²
where h and k are the abscissa and ordinate of the center of the circle, respectively. r, on the other hand is the measure of the radius. Thus, it is important to know the radius and coordinates of the center. The answer is letter D. 
4 0
3 years ago
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