A common air pollutant responsible for acid rain is sulfur dioxide (SO2 ) . Emissions of (SO2 ) from burning coal during year x are computed by f(x) in the table. Emissions of (SO2 ) from burning oil are computed by g(x). Amounts are given in millions of tons. X 1860 1900 1940 1970 2000 f(x) 2.4 12.6 24.2 32.2 54.0 g(x) 0 0.1 2.5 17.8 25.0 Answer questions (a) through (c) (a) Evaluate (f + g)(1970). (f + 9)(1970) = (Simplify your answer. Type an integer or a decimal.)