World Military Expenditure The following table shows total military and ar...

World Military Expenditure The following table shows total military and arms trade expenditure in 1994, 1998, and 2006. (See Exercise 19; t = 4 represents 1994.)

Find a quadratic model for these data, and use your model to estimate world military expenditure in 2008. Compare your answer with the actual figure shown in Exercise 19. HINT [See Example 5.]