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3 years ago

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At 3pm, Mikayla’s shadow was 1.2 meters long. Mikayla is 1.7 meters tall. She measures a tree’s shadow to be 7.5 meters. How tal

l is the tree?

2 answers:

NeX [460]3 years ago

7 0

2.5 meters is the answer

GaryK [48]3 years ago

6 0

1.2 / 1.7 = 7.5 / x
cross multiply
(1.2)(x) = (1.7)(7.5)
1.2x = 12.75
x = 12.75 / 1.2
x = 10.625 meters <==

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Answer:

<em>The large sample size 'n' = 199.6569≅ 200</em>

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Given Standard deviation of salary for all baseball players for 2015 is about $5,478,384.55

<em>Standard deviation of of salary for all baseball players for 2015 </em>

<em> (S.D ) σ = $5,478,384.55</em>

Given estimate of this average salary for all baseball players for 2015

= $497,000

<em>Given Margin of error of error is = $497,000 </em>

<em>Level of significance ∝ = 80% </em>

<em>The critical value Z₀.₂₀ = 1.282 </em>

<u><em>Step(ii):</em></u><em>-</em>

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

<em> </em> $M.E = \frac{Z_{0.20} S.D}{\sqrt{n} }$ <em></em>

<em> </em> $497,000 = \frac{1.282 X 5,478,384.55}{\sqrt{n} }$ <em></em>

Cross multiplication , we get

$\sqrt{n} = \frac{1.282 X 5,478,384.55}{497,000 }$

On calculation , we get

√n = 14.13

<em>Squaring on both sides, we get</em>

n = 199.6569

<u><em>Conclusion</em></u><em>:-</em>

<em>The large sample size 'n' = 199.6569≅ 200</em>

<em> </em>

<em></em>

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3 years ago

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algol13

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3 years ago

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3 years ago

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exis [7]

Answer:

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Step-by-step explanation:

3+4+5=12

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2 years ago

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3 years ago