1 year is made up of 12 months. So 12 divided by 2 is 6.
So that means the fish doubled in the pond twice a year. For 10 years
2 x 10 = 20
In the 10 years the fish doubled 20 times.
Starting with the original 8 8 x 2 = 16 1 16 x 2 =32 2 32 x 2 = 64 3 64 x 2 = 128 4 128 x 2 = 256 5 256 x 2 = 512 6 512 x 2 = 1024 7 1024 x 2 = 2048 8 2048 x 2 = 4096 9 4096 x 2 = 8192 10 8192 x 2 = 16384 11 16384 x 2 = 32768 12 32768 x 2 = 65536 13 65536 x 2 = 131072 14 131072 x 2 = 262144 15 262144 x 2 = 524288 16 524288 x 2 = 1048576 17 1048576 x 2 = <span>2097152 18 </span>2097152 x 2 = <span>4194304 19 </span>4194304 x 2 = <span>8388608 20 </span> D being your answer :)
Hope this helps. Brainliest is always appreciated if you feel its deserved.