Will Elijah Cummings vote for Joe Biden in the next presidential elections?
The next presidential elections will take place in November of 2020. Elijah Cummings passed away in October of 2019.
The answer is no.

Could Rhode Island sink into the Bohai Sea?
The Bohai Sea is 30,000 square miles. Rhode Island is 1,214 square miles.
The answer is yes.

Would 1996 leap year baby technically be 1 year old in 2000?
A leap year happens once every 4 years and has 29 days in February. The years 1996, 2000, 2004, 2008, 2012, 2016, and 2020 are the last 7 leap years that have happened. 1996 to 2000 is one leap year.
The answer is yes.

During the Cuban revolution, did the US experience a population boom?
After WWII, the US experienced a baby boom. WWII ended in 1945.
The answer is yes.