4 years ago

Whats the correct option?

Mathematics

1 answer:

scoray [572]4 years ago

6 0

-2 looks to be it as I can see I just would have to work it out

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What is the simplified form of the following expression? ^4 sqrt 16x^8y^12z^4

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4 years ago

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Solve the system by substitution. 4x-2y=14 y=12x-1

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3 years ago

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A study of 40 English composition professors showed that they spent, on average, 13 minutes correcting a student's term paper. T

photoshop1234 [79]

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90% confidence interval for the mean grading time of all composition papers.

(12.47981 , 13.52019)

Appropriate inequality

The interval is ( 12.47981 < μ < 13.52019)

Step-by-step explanation:

Explanation:-

Given sample size 'n' = 40

Mean of the sample = 13 minutes

standard deviation = 2 min

level of significance = 0.10 or 90%

90% confidence interval for the mean grading time of all composition papers.

$( x^{-} - Z_{0.1} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.10} \frac{S.D}{\sqrt{n} } )$

$( 13 - 1.645 \frac{2}{\sqrt{40} } , 13 +1.645 \frac{2}{\sqrt{40} } )$

( 13 - 0.52019 , 13 + 0.52019)

(12.47981 , 13.52019)

The interval is ( 12.47981 < μ < 13.52019)

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3 years ago

Factor the polynomial expression 16y4 - 256x12.

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Answer:

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Step-by-step explanation:

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