Answer: There are 640 tree frogs would be in 3 months.
Explanation:
Since we have given that
Population of frog becomes double in every two weeks.
There are 4 weeks in a month.
Initial population of frog=10
We need to find the number of tree frogs in 3 months.
Number of weeks in 3 months =

Number of two weeks in 12 weeks is given by

So, Number of tree frogs would be