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KatRina [158]
3 years ago
10

Convert: 15 days into seconds​

Mathematics
2 answers:
tankabanditka [31]3 years ago
8 0

Answer:

1296000 seconds

Step-by-step explanation:

Hope this helps

NNADVOKAT [17]3 years ago
7 0
Explanation:
1min=60secs
1hour= 60mins= 60x60= 3,600secs
1day= 24hrs= 3600x24= 86,400secs
Therefore, 15days= 86,400x15= 1,296,000secs

Answer: 15 days= 1,296,000 seconds

Hope it helps u! :)
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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]

Answer:

a)

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

(12.47981 , 13.52019)

b)

Appropriate inequality

The interval is  ( 12.47981 < μ < 13.52019)

Step-by-step explanation:

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

a)

Given sample size 'n' = 40

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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} } )

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( 13 - 0.52019 , 13 + 0.52019)

(12.47981 , 13.52019)

b)

The interval is  ( 12.47981 < μ < 13.52019)

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