Answer: The answer is 20 eggs.
Step-by-step explanation: Given that a scientist placed fish eggs in a tank. Also, each day, twice the number of eggs from the previous day hatch, .i.e, if 'x' number of eggs hatch on first day, then '2x' number of eggs will hatch on the second day.
The number of eggs that hatch on the sixth day is given by 5 times 2 to the second power.
So, the number of eggs got hatch on the sixth day is
Thus, the answer is 20 eggs.