Answer:
y = 3
Step-by-step explanation:
39 = 13y
y = 3 (explanation: by dividing 13)
Check answer:
39 = 13(3)
39 = 39
10 Triangles fit inside a Decagon
Hope it helps :)
There are a lot of numbers you can think of, for example, 1030, or even 9939, but I don't recommend you put that ;)
Answer:
A
Step-by-step explanation:

Horizontal asymptote: y = 0
Exponential growth.