Domain's partner in math (5)

I believe the answer is:

range

(Other definitions for range that I've seen before include "Scope (for target practice?)" , "Mountain stretch" , "Cooking appliance" , "Grassland - variety" , "Area for shooting practice" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.