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jeka57 [31]
3 years ago
8

What units are used when describing the length of time that the universe has been expanding?

SAT
1 answer:
Dmitriy789 [7]3 years ago
3 0

Answer:

kilometers/second per million parsecs

Explanation:

It is sometimes called Hubble time

It is what astronomers use for the Hubble constant

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nocturnal

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Which of the following energy producing nutrients generates adenosine triphosphate (ATP) at the fastest rate?
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C. starches

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Starches generate adenosine triphosphate (ATP) at the fastest rate.  :)

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6 0
3 years ago
How many liters each of a 50% acid solution and a 75% acid solution must be used to produce 90 liters of a 60% acid solution? (R
elena-14-01-66 [18.8K]

The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.

<h3>What is the litters about?</h3>

Note that:

We take x = volume of 25% solution.

We take y = volume of 65% solution.

So, Equation of total volume:

x + y = 80

Hence the equation of amount of acid:

0.25x + 0.65y = 0.45(80)

0.25x + 0.65y = 36

Solve x + y = 80 for x.

x = 80 - y

Then Substitute into the second equation.

0.25(80 - y) + 0.65y = 36

20 - 0.25y + 0.65y = 36

0.4y = 16

y = 40

x + y = 80

x + 40 = 80

x = 40

Therefore, The numbers of liters that is needed is 40 liters of 25% solution and 40 liters of 65% solution.

Learn more about liters from

brainly.com/question/17435066

#SPJ1

8 0
2 years ago
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