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Marat540 [252]
3 years ago
9

PLZ DON'T JUST TAKE POINTS I WILL REPORT YOU

Mathematics
1 answer:
AysviL [449]3 years ago
8 0

Answer:

"In mathematics, a unit circle is a circle of unit radius—that is, a radius of 1. Frequently, especially in trigonometry, the unit circle is the circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane." - Goog le

Step-by-step explanation:

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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
Buffy just put some money into a CD that pays 10.1% interest, compounded monthly. According to the rule of 72, in approximately
quester [9]
Let the principal be 'x' then the Amount will be 4x.

As the interest is compounded monthly:

Rate of interest = 10.1 % = 10.1/(100*12) = 0.101/12 

Time = 12t

Amount = Principal[1 + Rate/100]

⇒ 4x = x[1 + 0.101/12]¹²t

⇒ 4x/x [1 + 0.008416667]¹²t

⇒ 4 = [1.008416667]¹²t

⇒ log(4) = log[1.008416667]¹²t

⇒ 0.602059991327 = [0.003640014891]¹²t

⇒ 12t = 0.602059991327/0.003640014891

⇒ 12t = 165.400419876

⇒ t = 165.400419876/12

t = 13.78 years  or 13 years 9 months.

So, it is about 13 years 9 months she will have 4 times the amount of money.
5 0
3 years ago
Read 2 more answers
What is the slope of the line that passes through the points (3, 4) and (0, -2)
Vaselesa [24]

Answer:

The slope is :

4-(-2)/0-3

4+2/-3

6/-3

-2

-2 is the slope

8 0
2 years ago
Read 2 more answers
8x + 12<br> Can someone please factorise this
ivanzaharov [21]

Answer:

4(2x + 3)

Step-by-step explanation:

Given

8x + 12 ← factor out the common factor of 4 from both terms

= 4(2x + 3)

3 0
3 years ago
Melinda earns 5 minutes to play video games for every hour she spends on homework.
Law Incorporation [45]
<h2>Answer:</h2>

15 minutes

<h2>Step-by-step explanation:</h2>

For every hour of homework she gets 5 minutes of video games.

She spend 3 hours of homework.

We multiply 3*5

Answer is 15

8 0
3 years ago
Read 2 more answers
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