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Sladkaya [172]
3 years ago
14

On the first day of​ June, there were about 17.71 h of daylight in a city. Five months​ later, there were about 5.30 h of daylig

ht. What was the percent​ decrease?
Mathematics
1 answer:
Andru [333]3 years ago
7 0

Answer:

Percentage increases and decreases, are found by setting the problem up proportionally.

 

You are trying to find what percentage of 17.37 is 8.30 first.

 

so What %/100 = 8.30/17.37

 

Now define a variable:

 

Let x = What%  

 

x/100 = 8.30/17.37

17.37x = 830

x = 830/17.37

x ≈ 47.78

 

8.30 is approximately 47.78% of 17.37, so the percentage decrease is 100% - 47.78% = 52.22%

The percentage decrease is approximately 52.22%

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<h3>Answer:  A.  9</h3>

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Explanation:

Draw in the segments AO and OC.

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Since the triangles are congruent, this means the corresponding pieces AB and BC are the same length.

Then we can say:

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2*AB = 18

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AB = 9

In short, the chord AC is bisected by the perpendicular radius drawn in the diagram. So all we do is cut AC = 18 in half to get AB = 9.

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will understand after the explanation in DF is correct.

x is powering both numbers so it can be outside the parenthesis.

The question is incomplete the complete question is,

Which expressions are equivalent to the one below? Check all that apply.

3^x

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D.3(3^(x-1))

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F.18^x/6^x

To learn more about the  expression visit:

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