The table gives values of f(x, y), the number of milligrams of mosquito larvae per square meter in a swamp. x 0 4 8 0 1 3 6 y 5 2 5 9 10 4 9 15 if x and y are in meters and r is the rectangle 0 ≤ x ≤ 8, 0 ≤ y ≤ 10, find an underestimate for r f(x, y) da using δx = 4 and δy = 5 . give units and interpret your answer. the units of the integral are mosquito larvae, and the integral represents the total number of mosquito larvae in this section of swamp. the units of the integral are square meters, and the integral represents the area of the rectangle which contains the mosquito larvae. the units of the integral are milligrams, and the integral represents the total number of milligrams of mosquito larvae in this section of swamp. the units of the integral are milligrams, and th