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pogonyaev
3 years ago
13

Help plz I don’t rlly know

Mathematics
1 answer:
Digiron [165]3 years ago
4 0

Answer:

13 ft

Step-by-step explanation:

Perimeter is 48 so all four sides add to 48

You know width is 11 so 2x11 is 22.

Subtract the width from the total 48-22=26

Then because you are missing 2 sides divide the answer by 2.

26/2=13

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Answer: 68

Step-by-step explanation:

Formula for sample size when prior estimate of population proportion (p) is available:  n=p(1-p)(\dfrac{z^*}{E})^2

, where z*= critical-value.

E= Margin of error.

Let p be the population proportion of  trees are infected with the citrus red mite.

As per given , we have

p=\dfrac{1}{5}=0.2

E= ± 0.08

The critical z-value corresponding to 90% confidence level = z*=1.645

Substitute all the values in the above formula , we get

Required sample size  :n=(0.2)(1-0.2)(\dfrac{(1.645)}{0.08})^2

\Rightarrow\ n=(0.2)(0.8)(20.5625)^2

\Rightarrow\ n=0.16(422.81640625)\\\\\Rightarrow\ n=67.650625\approx68 [Rounded to next integer.]

Thus, the minimum sample size should be taken =68

6 0
3 years ago
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Nady [450]

Answer:

Step-by-step explanation:

9. the set containing all objects or elements and of which all other sets are subsets.

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13. 46 1/2

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1 year ago
Study Island circles<br> I need help!
Oksanka [162]

Answer:

It is A

Step-by-step explanation:

a= 3.14 x 7 x 7

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Step-by-step explanation:

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