Answer:
C; B
Step-by-step explanation:
The direct/explicit formula for a geometric sequence is the following:
Where <em>aₙ </em>represents the term <em>n</em>, <em>a</em> represents the initial value, and <em>r</em> represents the common ratio.
Therefore, to find the <em>nth</em> term, we just need to find the initial value and the common ratio.
1)
-8, 24, -72, 216...
The common ratio is the ratio between each consecutive term. Do two to confirm that they are indeed the same. Thus:
So, the common ratio is -3. And the initial value is -8. Thus, putting them into our equation:
Thus, the eighth term will be:
C
2)
Again, find the common ratio.
2, -14, 98, -686...
The common ratio is -7. The initial value is 2. Thus:
And the sixth term will be:
B
Answer:
Positive
Step-by-step explanation:
This uses the properties of a 30-60-90 triangle. the 90 m is opposite the 60 degree angle to convert to the side opposite the 30 divide 90 by
90 /
= 51.96 m or B
I think it’s D) 9 because when you find the mean of a set of values you are taking into account and adding all of the numbers, and then dividing them by how many numbers there is, so the mean would be summarizing all of them, hope this helps