Graph the functions. Shade the region. Find all relevant intersections: Where does f(x) intersect with g(x)? Where does each function cross the x-axis? How many integrals will you need?
The functions intersect at (2, 4). The area should be approximated with rectangles or trapezoids for 0 ≤ x ≤ 2 and added to the area of the triangle for 2 ≤ x ≤ 4.