In 1980 the world use of oil was 5,000,000,000 barrels and the demand for oil was growing exponentially at the rate of 15% per year. If the demand for oil continues at this rate, how many barrels of oil will the world use from 1980 to 2000?
◦ 267 billion barrels
◦ 428 billion barrels
◦ 98 billion barrels
◦ 636 billion barrels