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3 years ago

9

Which is prime????????

2 answers:

Mnenie [13.5K]3 years ago

5 0

11 is prime
3 is prime
17 is prime

The rest arent

Simora [160]3 years ago

3 0

Answer: 11, 3, and 17

so C E and F

Step-by-step explanation:

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A lawn service owner is testing new weed killers. He discovers that a particular weed killer is effective 89% of the time. Suppo

marissa [1.9K]

Answer:

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

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 $1 - \frac{\alpha}{2}$ .

He discovers that a particular weed killer is effective 89% of the time. Suppose that this estimate was based on a random sample of 60 applications.

This means that $\pi = 0.89, n = 60$

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 $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 - 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.8236$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.89 + 1.645\sqrt{\frac{0.89*0.11}{60}} = 0.9564$

The 90% confidence interval for p is (0.8236, 0.9564). The upper confidence limit for p is 0.9564.

3 0

3 years ago

Read 2 more answers

How many 2-digit numbers are multiples of 5 but not 4?

Luden [163]

10 , 15 , 25 , 30, 35, 45 , 50 , 55, 65, 70, 75, 85, 90, 95.

Answer is 14.

4 0

4 years ago

G/-9+27= 30 what is g

AfilCa [17]

Answer:

G/-9+27=30

or G/-9=30-27

or G/-9=3

or G=3×(-9)

or G=-27

The G is(-27).

4 0

3 years ago

Jan spends part of her year as a member of a gym. She then finds a better deal at another gym, so she cancels her membership wit

fiasKO [112]

Yeah so she spent half they year at the first one more than likely

8 0

3 years ago

Which expression is equivalent to (2−√−4)+(1+√−49)? <br> 3−5i <br> 3+5i <br> 8+0i <br> −2+0i

sergij07 [2.7K]

Answer:

3 + 5i.

Step-by-step explanation:

(2−√−4)+(1+√−49)

√−4 = 2i and

√−49 = 7i.

So (2−√−4 + (1+√−49

= ( 2 - 2i) + (1 + 7i)

= 3 + -2i + 7i

= 3 + 5i.

3 0

3 years ago