8. [8 points] In 1980, China consumed 1.85 million barrels of oil per day. By 2000, this had increased to 6.2 million barrels per day. Assuming exponential growth, in what year will China's consumption have increased to 42 million barrels per day? 9. [6 points] Find the exact values in the form a + bvc , of the other two roots of y = x3 - 51x + 90, given that 6 is one of its roots