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luda_lava [24]
3 years ago
13

Lincoln told his mother that 4 5/10

Mathematics
1 answer:
Sveta_85 [38]3 years ago
8 0

Answer:

4.5

Step-by-step explanation:

In order to find the answer to this question you will first need to convert Lincolns height into a improper fraction and then convert the improper fraction into a decimal number.

L =4\frac{5}{10}

Convert into improper fraction

4\frac{5}{10} =10 \times4=40+5=45=\frac{45}{10}

Convert into decimal by dividing the numerator by the denominator:

45\div10=4.5

L=4.5

Hope this helps.

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A researcher wishes to estimate within $5 the average repair cost of for a refrigerator. If she wishes to be 90% confident, how
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Answer:

The sample size 'n' = 26

Step-by-step explanation:

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

Given a researcher wishes to estimate within $5 the average repair cost of for a refrigerator

Given estimate "E" = $5

<em>The  estimate within  the average is determined by</em>

<em>                 </em>E = \frac{Z_{0.10}S.D }{\sqrt{n} }<em></em>

<em>  Level of significance    ∝ = 90 % or 10% </em>

<em>                                             = 0.90 or o.10</em>

<em>Z₀.₁₀ = 1.645</em>

                                 E = \frac{Z_{0.10}S.D }{\sqrt{n} }

                             5 = \frac{1.645 X15.50 }{\sqrt{n} }

                        √n =  \frac{25.49}{5} = 5.099

Squaring on both sides , we get

                        n = 26

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

<em>The sample size 'n' = 26</em>

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