Answer:
The answer is 64000.
Step-by-step explanation:
Given is -
Hiram raises 1000 earthworms in a square of compost 4 ft by 4 ft.
When the square of compost has a side length that is 8 times longer, means the area will increase by a factor of [tex]8\times8=64[/tex] times.
So, total earthworms will be = [tex]1000\times64=64000[/tex]