Question: please help and show work, thank you!! 3) A sample of well water is tested for its bacterial content in a plate count assay. A

please help and show work, thank you!!

3) A sample of well water is tested for its bacterial content in a plate count assay. A one- milliliter sample of the water is diluted in a 1:10 dilution series, 150 uL of the fourth dilution tube is plated in a spread plate. After incubation, the plate has 90 colonies, what is the original concentration in the sample? 4) A pool water sample is tested for its bacterial content in a plate count assay. A one- milliliter sample of the water is diluted in a 1:10 dilution series, 100uL of the third dilution tube is plated in a pour plate. After incubation, the plate has 191 colonies, what is the original concentration in the sample? 5) A sample of milk is tested for its bacterial content in a plate count assay. A one-milliliter sample of the milk is diluted in a 1:10 dilution series. One milliliter of the third dilution tube is plated in a pour plate. After incubation, the plate has 54 colonies, indicating that the original milk sample contained

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