Question

an earthworm was in the soil 9 inches below the surface to find moisture soil and move down to 7 in what is the position of the earth room now relatively to the surface

Answer 1

1) Gathering the data

Starting point: -9 inches below

Endpoint: -7 inches

2) The position or the location of that worm will be the sum of its displacements.

-9-7 = -16 inches

16 inches below the surface.