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2 years ago

12

Sammy plans to build a kite He has two rods of lengths 4 feet and 3 feet Find the area of the material he will need to cover the

kite A: 7 ft2
B: 3 ft2
C: 6 ft2
D: 12 ft2

1 answer:

Vitek1552 [10]2 years ago

6 0

The answer would be D: 12 ft2

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Answer:

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<em>Number of cars 'n' = 721</em>

Step-by-step explanation:

<u><em>Explanation</em></u>:-

<em>Given Population proportion 'p' = 0.40</em>

<em>Given Margin of error = 0.03</em>

<em>90% of level of significance </em>

<em> </em> $Z_{\frac{\alpha }{2} } = 1.645$ <em></em>

<em>The Margin of error is determined by</em>

<em></em> $M.E = \frac{Z_{\frac{\alpha }{2} S.D} }{\sqrt{n} }$ <em></em>

$0.03 = \frac{1.645 X \sqrt{0.40(1-0.40) } }{\sqrt{n} }$

on calculation , we get

0.03√n = 0.8058

$\sqrt{n} = \frac{0.8058}{0.03} = 26.86$

squaring on both sides , we get

n = 721.45≅721

<u><em>conclusion</em></u>:-

<em>The sample size 'n' = 721</em>

<em>Number of cars 'n' = 721</em>

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3 years ago

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spin [16.1K]

Answer:
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Step-by-step explanation:

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