Florida was once an ocean because pieces of coral reef were found there?

Yes

Explanation:

Until geologically recently much of Florida was below a warm shallow ocean, in conditions similar to the Bahamas today, and accumulated a lot of limestone. About 23 million years ago sea level dropped enough that portions of Florida became dry land and land animals occupied the area for the first time.

6.3%

explanation:

the acceptance rate for yale university is 6.3%. this means that only 6 percent of people who apply actually get accepted!