Answer:
There will be 496 ants after a year.
Explanation:
First, we need to create an equation. The equation in this case will be y = 31(2)^x/3. 31 is the initial amount, 2 represents that it is doubling, and x is how many total months there are. The x, in this case, will be 12, as there are 12 months in a year. Then, we do 12/3, because it is doubling every three months, which equals 4, signifying that the population will double 4 times over a year. We can then plug in 4 to the exponent place, then solve the equation. 2^4 is equal to 16, so we then multiply 31 by 16, getting us our final answer, 496 ants.