Answer:
-3
Step-by-step explanation:
idk im just guessing
Can you please paste a picture of the triangle? I am happy to help, but I need to see the triangle. :-)
The common ratio in a geometric sequence is the ratio between 2 consecutive terms:
-8/2=-4,
then the sequence is 2, -8, 32, -128, -512, 2048, ...
let

be the nth term of the sequence, then




.
.
.
so clearly

and, clearly n are integers >0, since we have a 1st term, a second term and so on... of a sequence (we do not have a "zero'th term"!
Answer:
<span>C. an=2(-4)^n-1; all integers where n>0</span>
Because the tree is the halfway point, the building would be twice as tall:
The building is 38 x 2 = 76 feet tall.