Question

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

Explanation:

Exact numbers result from counting (like 10 dogs, 25 atoms, 1 dozen eggs (12 is exact), 3 rulers) or defined quantities. Inexact numbers come from measurements (with uncertainty). 50 meters is a measured length, so it's inexact. The others are exact (counted or defined).

Answer:

C. 50 meters