9514 1404 393
Answer:
- positive decrease in depth
- negative change in depth
Step-by-step explanation:
Depth of snowfall is usually measured above some base. The greater the depth, the higher the surface is above the base.
When the depth decreases, as by melting, the change in depth is negative. That is, the difference between the new depth and the old one is negative. A 12" depth experiencing a change of -1 inch becomes an 11" depth.
If the question is about how much the depth decreased, the decrease is given as a positive value. A 12" depth decreased by (+)1 inch becomes an 11" depth.
The sign of the number of interest depends on what question it is answering.
