Answer:
512
Explanation:
1+1 = 2
2+2 = 4
4+4 = 8
8+8 = 16
16+16 = 32
32+32 = 64
64+64 = 128
128+128 = 256
256+256 = 512
they add the answer by itself. hope this helps
5.1m questions
6.7m answers