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Artyom0805 [142]
3 years ago
8

Can someone help me

Social Studies
2 answers:
GaryK [48]3 years ago
8 0

Answer:

We breathe in air which has a higher concentration of oxygen than carbon dioxide and we breathe out air with a higher concentration of carbon dioxide. Both the gases are present in the inhaled and the exhaled air.

lesya692 [45]3 years ago
5 0

Answer:

People do not only breathe in oxygen.

Explanation:

In fact, when breathing in normal air, you only take in about 21% oxygen, the rest of the gasses being mainly nitrogen (about 79%). As for breathing out, it is mainly carbon dioxide, but there are a couple more gasses in there.

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In an experiment, which variable changes in response to the manipulation of another variable?
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The variable that changes is the dependent variable: it changes according to the dependent variable (this is the answer)
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Which of the following most accurately describes what banks do with their
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C.

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A teacher gave a quiz to her class of 30 students. However, she misplaced one of the quizzes. The teacher calculated the mean of
solniwko [45]

Answer:

mean of all 30 students is 69

Explanation:

given data

students = 30

mean = 29

μ = 68 points

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to find out

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solution

we know here mean score of 29 students is 68

so sum of score is here = 29 × 68

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so

sum of 30 students score is = sum of 29 students score + missing score

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so

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mean of all 30 students is 69

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What type of government does the United States have?
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