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Ira Lisetskai [31]

3 years ago

14

A computer chip has the dimensions 8mm x 8mm but the scale is drawn with the ...

1 answer:

Yuliya22 [10]3 years ago

6 0

Given that the chip has a dimension of 8 mm by 8 mm which can be written as 0.8 cm by 0.8 cm, is drawn to scale and the dimensions of the plot is 4 cm by 4 cm, the scale of the drawing will be:
0.8 cm is represented by 4 cm
thus;
4 cm rep 0.8 cm
1 cm rep 0.2 cm
The answer is:
1 cm rep 0.2 cm

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What percent is 8 out of 15

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You are interested in purchasing a new car. One of the many points you wish to consider is the resale value of the car after 5 y

gulaghasi [49]

Answer:

The 95% confidence interval for the true mean resale value of a 5-year-old car of this model

(11,688.68 , 12,511.32)

Step-by-step explanation:

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

Given sample size 'n' = 17

mean of the sample x⁻ = 12,100

Standard deviation of the sample (S) = 800

The 95% confidence interval for the true mean resale value of a 5-year-old car of this model

$(x^{-} - t_{0.05} \frac{S}{\sqrt{n} } , x^{-} + t_{0.05} \frac{S}{\sqrt{n} } )$

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

<u><em>Degrees of freedom ν =n-1 = 17-1 =16</em></u>

<u><em></em></u> $t_{(16 , 0.05)} = 2.1199$ <u><em></em></u>

The 95% confidence interval for the true mean resale value of a 5-year-old car of this model

$(x^{-} - t_{0.05} \frac{S}{\sqrt{n} } , x^{-} + t_{0.05} \frac{S}{\sqrt{n} } )$

$(12,100 - 2.1199\frac{800}{\sqrt{17} } , 12,100 + 2.1199 \frac{800}{\sqrt{17} } )$

(12,100 - 411.32 , 12,100 + 411.32)

(11,688.68 , 12,511.32)

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We’re is the graph for this problem?

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8th grade math help? I upvote. :3

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Hey man! I'm here to help. I'm in Grade 8 too :)

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