Gdp of a developing country a developing countrys gross

Question

Question: GDP of a developing country a developing country's gross domestic product (gdp) from 2000 to 2008 is approximated by the function

G(t) = -0.2t³ + 2.4t² + 60              (0 ≤ t ≤ 8)

Where G(t) is measured in billions of dollars, with t 0 corresponding to 2000. Sketch the graph of the function G and interpret your results.