The following information is available for a seeded 5-day bod test conducted on a wastewater sample. 15 ml of the waste sample was added directly into a 300-ml bod incubation bottle. the initial do of the diluted sample was 8.8 mg/l and the final do after 5 days was 1.9 mg/l. the corresponding initial and final do of the seeded dilution water was 9.1 and 7.9 respectively. what is the 5-day bod (bod5) of the wastewater sample?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.