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Tju [1.3M]
3 years ago
13

Help!!! 10 points dhdhdhhhshmsmhsm

Mathematics
1 answer:
Citrus2011 [14]3 years ago
6 0
Second one sorry if i’m wrong
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1/5 divided by 3 is what
Vsevolod [243]

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the answer would be 1/15, or approximately 0.067.

Step-by-step explanation:

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A is correct. Hope my answer helped u :)
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This is a hard one for me. Can someone solve this one.
asambeis [7]

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100

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3 years ago
In 2009 the life expectancy is about 80 life expectancy gains 5.7 years every decade. From 2009 in how many years would humanity
Dmitry [639]

Answer:

  about 70 years

Step-by-step explanation:

Life expectancy (e) improves by 5.7 years every 10 years, so 5.7/10 = 0.57 years per year. For t years after 2009, it can be modeled by ...

  e = 0.57t +80

We want to find when that is 120:

  120 = 0.57t +80

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About 70 years from 2009, humanity may achieve a life expectancy of 120 years.

3 0
3 years ago
What are the hypotheses for testing to see if a correlation is statistically significant?
Andrew [12]

Answer:

Step-by-step explanation:

For testing of significance of correlation coefficient denoted by r, we create hypotheses in three ways

They are one tailed, two tailed.  One tailed can be stated as right tailed and also left tailed.

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Verbally we can say this there is no association between the dependent and independent variable (linear)

Against this alternate hypothesis is created as

either r not equal to 0

or r>0 or r<0

If r not equal to 0, we say two tailed hypothesis test

If r>0 is alternate hypothesis, it is right tailed test

If r<0 is alternate hypothesis, then it is left tailed test.

8 0
3 years ago
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