Why is there 0ne senate seat in California for every 18 million people and one senate seat in Delaware for every 280000 people?

Answer 1

Because California has a larger population then Delaware.

Answer 2

The number of Senate seats a state has is based on the state's population size and historical representation agreements. Each state is guaranteed two Senate seats regardless of population size to ensure equal representation among states. While California has a high population size, its Senate representation remains fixed at two seats, while smaller states like Delaware have greater Senate representation per capita due to the equal representation framework.