Question

which quantity is an inexact number?
○10 dogs
○25 atoms
○50 meters
○1 dozen eggs
○3 rulers

Explanation:

Exact numbers are counted or defined (like 1 dozen = 12, number of objects counted). Inexact numbers come from measurements (with uncertainty). "50 meters" is a measurement (length), so it's inexact. Others (10 dogs, 25 atoms, 1 dozen, 3 rulers) are exact counts/definitions.

Answer:

C. 50 meters