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Svetach [21]
2 years ago
12

What is adjacent??????

Mathematics
1 answer:
alina1380 [7]2 years ago
5 0
Next to or adjoining something else.
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3x + c = 3x + 2<br> i want to know the answers to this equations
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Isabella save 2 nickels today, if she doubles the number of Nicole, she saves every day, how many days, including today, will it
Elden [556K]

Answer:

  8 days

Step-by-step explanation:

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_____

The number of nickels saved on day n is 2^n. The total is 2^(n+1)-2.

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The above can be written down from your knowledge of binary sequences. If you want a more formal development, read on.

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The number of nickels saved on day n is a geometric sequence with first term 2 and common ratio 2. The n-th term of the sequence is ...

  an = a1·r^(n-1) = 2·2^(n-1) = 2^n

The sum of n terms of the sequence is ...

  S = a1(r^n -1)/(r -1) = 2(2^n -1)/(2-1)

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__

We want S > 500, so ...

  500 < 2^(n+1) -2

  502 < 2^(n+1)

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  n > log(251)/log(2)

  n > 7.97 . . . . . . . . 8 days or more to save more than 500 nickels

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3 years ago
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