Answer: c
Step-by-step explanation:
Answer:

Step-by-step explanation:
The explicit formula for a geometric sequence:

- n-th term
- first term
- common ratio

We have

The common ratio:

<h2>It's not a geometric sequence.</h2>
If
then the common ratio is 
Put to the explicit formula:

Put
and solve for <em>n </em>:


Answer:
C. 3
Step-by-step explanation:
This is a 30 60 90 triangle. To get from 3 rad 3 to x you need to divide rad 3 which gives you 3.
So 36% of x is 18
percent is parts out of 100
36%=36/100=0.36
'of' can be translated as muitiply
0.36 times x=18
divide both sdies by .36
x=50
the number is 50
There are 16 ways to arrange the row so that at least 3 girls always sit next to each other.