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DochEvi [55]
2 years ago
8

One hundred samples of five data points were randomly selected from each of four populations. The medians of each population's s

amples were plotted as shown below. Another random sample was then taken from one of the populations and recorded as follows:
{51, 46, 49, 50, 48}

From which population was this sample MOST likely selected?

A.
​Population A
B.
​Population B
C.
​Population C
D.
​Population D

Mathematics
1 answer:
Aleks04 [339]2 years ago
8 0
B my sister did this on a p e x
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A rock outcrop was found to have 95.82% of its parent U- 238 isotope remaining. Approximate the age of the outcrop. The half-lif
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Answer:

A) 277 million years

Step-by-step explanation:

Here, decay of U-238 is first order reaction. (since most of the nuclear decays are first order).

so, the equation t = \frac{1}{k} × ln(\frac{A(0)}{A})

where, t = time from start of reaction

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           A(0) = initial concentration; A = present concentration.

     ⇒ 4.5 billion = 4500 million years = \frac{1}{k}× ln2.

Now, given 95.82% of parent U-238 isotope is left.

⇒ t = \frac{1}{k} × ln(\frac{A(0)}{A})

  t = \frac{4500}{ln2} × ln(\frac{100}{95.82})

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3 years ago
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Answer:

it would take 30 and a half days to make 240 cookies

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skelet666 [1.2K]
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3x+8=2x+21<br> X=?<br> (all working out needed)
Dahasolnce [82]

Answer:

x=13

Step-by-step explanation:

3x=2x+21−8

3x=2x+13

3x−2x=13

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