Answer: 5. the interstate highway system: The building of the interstate highway system which cost $129 billion.
6. 80%
7. Many towns were bypasses because of an interstate highway.
8. 13 million would be built in the next decade. 8. In 1946, one baby was born every 10 seconds. This was called the baby boom.
Explanation: Hopefully this helps you. I am giving some details about this also for some of them. I don't know if these are the right answers.
