ANSWER TO MATH QUESTION:

450 CADETS X 2 LOADS PER CADET X 10 GALLONS PER LOAD = 9,000 GALLONS.

ANSWER TO SCIENCE QUESTION:

THE BLUE WHALE IS THE ANSWER TO BOTH QUESTIONS.

ANSWER TO GEOGRAPHY QUESTION:

CUBA

ANSWER TO HISTORY QUESTION:

40 YEARS, HE WAS PRIME MINISTER FROM 1959-1976 AND PRESIDENT FROM 1976 TO THE PRESENT