Question

Based on the visual, what expression what we used to represent the situation and not to write it all out?

Answer 1

$2^4$

1) In this question, we need to realize that the first stage is beginning with 2 circles. And the next one gets 4, or 2², the third has 2³ or 8 circles, and so on and so forth.

2) Based on that pattern, we can tell that the 4th stage will have:

$2^4\:(16)\:circles.$