A landfill sample was analyzed by dilution and plating techniques for viable bacterial count. When one gram of the landfill sample was diluted 1 x 10 −4^{-4} −4 (w/v), it yielded 400 CFU. The viable bacterial count (in million, rounded off to the nearest integer) in one gram landfill sample is _______.

Answer: 4 million textbf{Explanation:} The viable count is calculated by multiplying the colony-forming units (CFUs) by the dilution factor. In this case: [latex] 400 times 10^4 = 4,000,000 text{ CFU/g} [/latex] which is equivalent to 4 million CFU/g.