Question: Oil imports crude oil and petroleum products are imported continuously by the United States. The table and figure on the next page show the rate of U.S. oil imports (in billions of barrels per year) (Source: Energy Information Administration).
(a) Use n = 5 equal subdivisions and left-hand endpoints to estimate the area under the graph from 2000 to 2010.
(b) What does this area represent in terms of U.S. oil imports?
