Which ancient civilization was the first to use city planning and sewer systems?

a, both were musicians during the jazz age

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.

answer: the unlawful use of violence and intimidation, especially against civilians, in the pursuit of political aims.

explanation: