which field of economics studies how the number of firms effects???

Answer: Microeconomics
Question: when did lucille ball start i love lucy?

Answer: October 15, 1951
Answer this question: who wrote ball and chain by social distortion??

Mike Ness
Q: who played the joker in the dark knoght?A: Australian actor Heath Ledger
Input: how many season of the kardashians are there?

Output: 15
when did gateway arch become a national park???

Answer:
February 22, 2018