An elevator for a diamond mine descends 2750 feet into the earth before arriving at its final destination. There are emergency stopping floors with first aid supplies and access to a staircase every 125 feet along the way.

Write an explicit rule that relates the elevator’s depth to which emergency stopping floor it is positioned at.

How far down will the elevator have descended when it is positioned at its 5th emergency stopping floor?

What emergency stopping floor will the elevator be positioned at when it is 2375 underground?

How many emergency stopping floors are there altogether?