Question

how are the equator and the prime meridian used on maps?
to provide a reference system

to separate earths four hemispheres

to measure distances east and west

to identify the location of earths continents

Explanation:

The equator (0° latitude) and prime meridian (0° longitude) form the baseline of the geographic coordinate system. While they do split the Earth into hemispheres, their core function on maps is to create a reference framework to define any global location. Measuring east-west distance is only the prime meridian's related role, and they don't directly identify continent locations.

Answer:

to provide a reference system