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alexandr1967 [171]
3 years ago
5

Please help me with this !!

Mathematics
1 answer:
Sergio [31]3 years ago
3 0

Answer: AC = 7√3

tan 30° = \frac{BC}{AC}

=> \frac{BC}{AC}=\frac{1}{\sqrt{3} }\\\\\=> AC=BC\sqrt{3} =7\sqrt{3}

Step-by-step explanation:

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 160 engines
abruzzese [7]

Answer:

Test statistic   Z = 2.1097

Step-by-step explanation:

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

Given that size of the sample 'n' = 160

Given that mean of the Population(μ)  = 5.3pounds/square inch

The Standard deviation of the population(σ) = 0.6

Mean of the sample(x⁻) = 5.4

Level of significance =0.1

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

Test statistic

    Z = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

   Z = \frac{5.4-5.3}{\frac{0.6}{\sqrt{160} } }

  Z = 2.1097

<u><em>Final answer</em></u>:-

Test statistic   Z = 2.1097

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Paha777 [63]

Answer:

24

Step-by-step explanation:

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jeka57 [31]

Answer: (1,6)

Step-by-step explanation:

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38.9 divided by 2.91<br> What is my answer
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Your answer would be 13.4 if you round to the nearest tenth. 
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