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Serjik [45]
3 years ago
7

Which of the following statements is/are true?

Mathematics
1 answer:
iragen [17]3 years ago
8 0
C) I and III only

THird one is true and it is only option containing the third option
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4. Find the surface area of the space figure represented by the net.
Pavel [41]
The correct answer is C. 20 characters
4 0
3 years ago
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:

On day 8, Isabella will save 256 nickels, bringing her total to 510.

_____

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

_____

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)

  S = 2^(n+1) -2

__

We want S > 500, so ...

  500 < 2^(n+1) -2

  502 < 2^(n+1)

  251 < 2^n

  log(251) < n·log(2)

  n > log(251)/log(2)

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

3 0
3 years ago
9 is the difference of a number n and 7
Varvara68 [4.7K]
N - 7 = 9 if you want it written in equation form
3 0
3 years ago
Read 2 more answers
How is 7.54÷4= 1.88<br><br>I got 1.88 with the remainder of 2​
Naddika [18.5K]

Answer:

I got 1.885 for the answer.

Maybe they wanted it rounded to just 2 decimal places.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the solution to -2(3x - 9) + 5x = -10?
sweet-ann [11.9K]
-2(3x - 9) + 5x = -10
-6x + 18 + 5x = -10
-6x + 5x = -10 - 18
-x = -28
x = 28 <===
6 0
3 years ago
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